前两篇我们介绍了JDBC和Cassandra的gRPC streaming实现。相对MongoDB来说，JDBC和Cassandra支持字符类型的query语句SQL,CQL，所以把query指令转换成protobuf structures是简单直接的。而MongoDB没有提供字符类的query，所以我们必须进行MongoDB query涉及的所有类型与protobuf类型的相互转换，实现gRPC功能会复杂的多。我们在这篇讨论里先介绍MongoDB query的protobuf转换。
在前面的MongoDB-Engine讨论里我们设计了个MGOContext作为JVM内部传递MongoDB query的数据结构：
case class MGOContext(
dbName: String,
collName: String,
actionType: MGO_ACTION_TYPE = MGO_QUERY,
action: Option[MGOCommands] = None
) {
ctx =>
def setDbName(name: String): MGOContext = ctx.copy(dbName = name)
def setCollName(name: String): MGOContext = ctx.copy(collName = name)
def setActionType(at: MGO_ACTION_TYPE): MGOContext = ctx.copy(actionType = at)
def setCommand(cmd: MGOCommands): MGOContext = ctx.copy(action = Some(cmd))
}
下面是这个结构支持的action清单：
object MGOCommands {
case class Count(filter: Option[Bson], options: Option[Any]) extends MGOCommands
case class Distict(fieldName: String, filter: Option[Bson]) extends MGOCommands
/* org.mongodb.scala.FindObservable
import com.mongodb.async.client.FindIterable
val resultDocType = FindIterable[Document]
val resultOption = FindObservable(resultDocType)
.maxScan(...)
.limit(...)
.sort(...)
.project(...) */
case class Find(filter: Option[Bson] = None,
andThen: Option[FindObservable[Document] => FindObservable[Document]]= None,
firstOnly: Boolean = false) extends MGOCommands
case class DocumentStream(filter: Option[Bson] = None,
andThen: Option[FindObservable[Document] => FindObservable[Document]] = None,
) extends MGOCommands
case class Aggregate(pipeLine: Seq[Bson]) extends MGOCommands
case class MapReduce(mapFunction: String, reduceFunction: String) extends MGOCommands
case class Insert(newdocs: Seq[Document], options: Option[Any] = None) extends MGOCommands
case class Delete(filter: Bson, options: Option[Any] = None, onlyOne: Boolean = false) extends MGOCommands
case class Replace(filter: Bson, replacement: Document, options: Option[Any] = None) extends MGOCommands
case class Update(filter: Bson, update: Bson, options: Option[Any] = None, onlyOne: Boolean = false) extends MGOCommands
case class BulkWrite(commands: List[WriteModel[Document]], options: Option[Any] = None) extends MGOCommands
}
object MGOAdmins {
case class DropCollection(collName: String) extends MGOCommands
case class CreateCollection(collName: String, options: Option[Any] = None) extends MGOCommands
case class ListCollection(dbName: String) extends MGOCommands
case class CreateView(viewName: String, viewOn: String, pipeline: Seq[Bson], options: Option[Any] = None) extends MGOCommands
case class CreateIndex(key: Bson, options: Option[Any] = None) extends MGOCommands
case class DropIndexByName(indexName: String, options: Option[Any] = None) extends MGOCommands
case class DropIndexByKey(key: Bson, options: Option[Any] = None) extends MGOCommands
case class DropAllIndexes(options: Option[Any] = None) extends MGOCommands
}
可以看到，我们必须把Bson、Document、FindObservable这几个类型对应到protobuf格式。下面是.proto文件里的部分内容：
message MGODocument {
bytes document = 1;
}
message MGOBson {
bytes bson = 1;
}
message ResultTransformer { //FindObservable
int32 optType = 1;
MGOBson bsonParam = 2;
int32 valueParam = 3;
}
message MGOAdminOptons {
string tarName = 1;
repeated MGOBson bsonParam = 2;
OptionAny options = 3;
string objName = 4;
}
message MGOOperations { //MGOContext
string dbName = 1;
string collName = 2;
int32 commandType = 3;
repeated MGOBson bsonParam = 4;
repeated ResultTransformer resultOptions = 5;
OptionAny options = 6;
repeated MGODocument documents = 7;
google.protobuf.BoolValue only = 8;
MGOAdminOptons adminOptions = 9;
}
首先，Document是个serializable类，可以直接进行序列/反序列化：
val po = Document (
"ponum" -> "po18012301",
"vendor" -> "The smartphone compay",
"remarks" -> "urgent, rush order",
"podtl" -> Seq(
Document("item" -> "sony smartphone", "price" -> 2389.00, "qty" -> 1239, "packing" -> "standard"),
Document("item" -> "ericson smartphone", "price" -> 897.00, "qty" -> 1000, "payterm" -> "30 days")
)
)
println(po)
val pobytes = marshal(po)
println(s"po bytes: ${pobytes}")
val po1 = unmarshal[Document](pobytes)
println(s"back to po document: $po1")
下一个是Bson，它是个java interface：
/**
* An interface for types that are able to render themselves into a {@code BsonDocument}.
*
* @since 3.0
*/
public interface Bson {
/**
* Render the filter into a BsonDocument.
*
* @param documentClass the document class in scope for the collection. This parameter may be ignored, but it may be used to alter
* the structure of the returned {@code BsonDocument} based on some knowledge of the document class.
* @param codecRegistry the codec registry. This parameter may be ignored, but it may be used to look up {@code Codec} instances for
* the document class or any other related class.
* @param <TDocument> the type of the document class
* @return the BsonDocument
*/
<TDocument> BsonDocument toBsonDocument(Class<TDocument> documentClass, CodecRegistry codecRegistry);
}
Bson只是一个interface，不是serilizable，不过BsonDocument可以：
/**
* A type-safe container for a BSON document. This class should NOT be sub-classed by third parties.
*
* @since 3.0
*/
public class BsonDocument extends BsonValue implements Map<String, BsonValue>, Cloneable, Bson, Serializable {...}
所以我们可以用BsonDocument来进行序列/反序列后在再用它来构建一个新的Bson对象：
def bsonToProto(bson: Bson) =
MGOBson(marshal(bson.toBsonDocument(
classOf[org.mongodb.scala.bson.collection.immutable.Document],DEFAULT_CODEC_REGISTRY)))
def protoToBson(proto: MGOBson): Bson = new Bson {
val bsdoc = unmarshal[BsonDocument](proto.bson)
override def toBsonDocument[TDocument](documentClass: Class[TDocument], codecRegistry: CodecRegistry): BsonDocument = bsdoc
}
最后是这个FindObservable：这个类型的应用场景是这样的：
/* org.mongodb.scala.FindObservable
import com.mongodb.async.client.FindIterable
val resultDocType = FindIterable[Document]
val resultOption = FindObservable(resultDocType)
.maxScan(...)
.limit(...)
.sort(...)
.project(...) */
case class Find(filter: Option[Bson] = None,
andThen: Option[FindObservable[Document] => FindObservable[Document]]= None,
firstOnly: Boolean = false) extends MGOCommands
FindObservable类型的效果可以是一连串施用的结果，因为是FindObservable[A] => FindObservable[A]这样的款式，所以我们可以用一串FindObservable[Document]来进行序列/反序列化处理，然后再重新串连施用来获得最终的FindObservable。FindObservable对应的protobuf结构如下：
message ResultTransformer { //FindObservable
int32 optType = 1;
MGOBson bsonParam = 2;
int32 valueParam = 3;
}
type FOD_TYPE = Int
val FOD_FIRST = 0 //def first(): SingleObservable[TResult], return the first item
val FOD_FILTER = 1 //def filter(filter: Bson): FindObservable[TResult]
val FOD_LIMIT = 2 //def limit(limit: Int): FindObservable[TResult]
val FOD_SKIP = 3 //def skip(skip: Int): FindObservable[TResult]
val FOD_PROJECTION = 4 //def projection(projection: Bson): FindObservable[TResult]
//Sets a document describing the fields to return for all matching documents
val FOD_SORT = 5 //def sort(sort: Bson): FindObservable[TResult]
val FOD_PARTIAL = 6 //def partial(partial: Boolean): FindObservable[TResult]
//Get partial results from a sharded cluster if one or more shards are unreachable (instead of throwing an error)
val FOD_CURSORTYPE = 7 //def cursorType(cursorType: CursorType): FindObservable[TResult]
//Sets the cursor type
val FOD_HINT = 8 //def hint(hint: Bson): FindObservable[TResult]
//Sets the hint for which index to use. A null value means no hint is set
val FOD_MAX = 9 //def max(max: Bson): FindObservable[TResult]
//Sets the exclusive upper bound for a specific index. A null value means no max is set
val FOD_MIN = 10 //def min(min: Bson): FindObservable[TResult]
//Sets the minimum inclusive lower bound for a specific index. A null value means no max is set
val FOD_RETURNKEY = 11 //def returnKey(returnKey: Boolean): FindObservable[TResult]
//Sets the returnKey. If true the find operation will return only the index keys in the resulting documents
val FOD_SHOWRECORDID=12 //def showRecordId(showRecordId: Boolean): FindObservable[TResult]
//Sets the showRecordId. Set to true to add a field `$recordId` to the returned documents
case class ResultOptions(
optType: FOD_TYPE,
bsonParam: Option[Bson] = None,
valueParam: Int = 0 ){
def toProto = new sdp.grpc.services.ResultTransformer(
optType = this.optType,
bsonParam = this.bsonParam.map {b => sdp.grpc.services.MGOBson(marshal(b))},
valueParam = this.valueParam
)
def toFindObservable: FindObservable[Document] => FindObservable[Document] = find => {
optType match {
case FOD_FIRST => find
case FOD_FILTER => find.filter(bsonParam.get)
case FOD_LIMIT => find.limit(valueParam)
case FOD_SKIP => find.skip(valueParam)
case FOD_PROJECTION => find.projection(bsonParam.get)
case FOD_SORT => find.sort(bsonParam.get)
case FOD_PARTIAL => find.partial(valueParam != 0)
case FOD_CURSORTYPE => find
case FOD_HINT => find.hint(bsonParam.get)
case FOD_MAX => find.max(bsonParam.get)
case FOD_MIN => find.min(bsonParam.get)
case FOD_RETURNKEY => find.returnKey(valueParam != 0)
case FOD_SHOWRECORDID => find.showRecordId(valueParam != 0)
}
}
}
object ResultOptions {
def fromProto(msg: sdp.grpc.services.ResultTransformer) = new ResultOptions(
optType = msg.optType,
bsonParam = msg.bsonParam.map(b => unmarshal[Bson](b.bson)),
valueParam = msg.valueParam
)
}
我们可以用这个ResultOptions类型的toProto,fromProto来进行protobuf的转换处理。然后用aggregation实现连串施用：
def toResultTransformer(rts: Seq[ResultTransformer]): FindObservable[Document] => FindObservable[Document] = findObj =>
rts.foldRight(findObj)((a,b) => ResultOptions.fromProto(a).toFindObservable(b))
下面这个函数示范了Find Context的反序列：
def CtxFromProto(proto: MGOOperations): MGOContext = proto.commandType match {
case MGO_COMMAND_FIND => {
var ctx = new MGOContext(
dbName = proto.dbName,
collName = proto.collName,
actionType = MGO_QUERY,
action = Some(Find())
)
def toResultTransformer(rts: Seq[ResultTransformer]): FindObservable[Document] => FindObservable[Document] = findObj =>
rts.foldRight(findObj)((a,b) => ResultOptions.fromProto(a).toFindObservable(b))
(proto.bsonParam, proto.resultOptions, proto.only) match {
case (Nil, Nil, None) => ctx
case (Nil, Nil, Some(b)) => ctx.setCommand(Find(None, None, b))
case (bp,Nil,None) => ctx.setCommand(
Find(Some(protoToBson(bp.head)),None,false))
case (bp,Nil,Some(b)) => ctx.setCommand(
Find(Some(protoToBson(bp.head)),None,b))
case (bp,fo,None) => {
ctx.setCommand(
Find(Some(protoToBson(bp.head)),Some(toResultTransformer(fo)),false))
}
case (bp,fo,Some(b)) => {
ctx.setCommand(
Find(Some(protoToBson(bp.head)),Some(toResultTransformer(fo)),b))
}
case _ => ctx
}
}
}
具体的应用示范例如下：
val eqState = equal("state","California")
val proj = exclude("rowid","_id")
val rtxfmr = Seq(
ResultOptions(
optType = FOD_LIMIT,
valueParam = 3)
,ResultOptions(
optType = FOD_PROJECTION,
bsonParam = Some(proj))
)
val protoCtx = MGOProtoMsg(
dbName = "testdb",
collName = "aqmrpt",
commandType = MGO_COMMAND_FIND,
bsonParam = Seq(eqState),
resultOptions = rtxfmr
).toProto
val findCtx = CtxFromProto(protoCtx)
val futFind = mgoQuery[Seq[Document]](findCtx)
futFind.onComplete {
case Success(docs) => docs.asInstanceOf[Seq[Document]].foreach{doc => println(doc.toJson())}
case Failure(e) => println(e.getMessage)
}
下面是本次讨论的部分源代码：
MongoDBEngine.scala
package sdp.mongo.engine
import java.text.SimpleDateFormat
import akka.NotUsed
import akka.stream.alpakka.mongodb.scaladsl._
import akka.stream.scaladsl.{Flow, Sink, Source}
import org.mongodb.scala.MongoClient
import org.mongodb.scala.bson.collection.immutable.Document
import org.bson.conversions.Bson
import org.mongodb.scala._
import org.mongodb.scala.model._
import java.util.Calendar
import scala.collection.JavaConverters._
import sdp.file.Streaming._
import akka.stream.Materializer
import org.mongodb.scala.bson.{BsonArray, BsonBinary}
import scala.concurrent._
import scala.concurrent.duration._
import sdp.logging.LogSupport
object MGOContext {
type MGO_ACTION_TYPE = Int
val MGO_QUERY = 0
val MGO_UPDATE = 1
val MGO_ADMIN = 2
trait MGOCommands
object MGOCommands {
case class Count(filter: Option[Bson], options: Option[Any]) extends MGOCommands
case class Distict(fieldName: String, filter: Option[Bson]) extends MGOCommands
/* org.mongodb.scala.FindObservable
import com.mongodb.async.client.FindIterable
val resultDocType = FindIterable[Document]
val resultOption = FindObservable(resultDocType)
.maxScan(...)
.limit(...)
.sort(...)
.project(...) */
case class Find(filter: Option[Bson] = None,
andThen: Option[FindObservable[Document] => FindObservable[Document]]= None,
firstOnly: Boolean = false) extends MGOCommands
case class DocumentStream(filter: Option[Bson] = None,
andThen: Option[FindObservable[Document] => FindObservable[Document]] = None,
) extends MGOCommands
case class Aggregate(pipeLine: Seq[Bson]) extends MGOCommands
case class MapReduce(mapFunction: String, reduceFunction: String) extends MGOCommands
case class Insert(newdocs: Seq[Document], options: Option[Any] = None) extends MGOCommands
case class Delete(filter: Bson, options: Option[Any] = None, onlyOne: Boolean = false) extends MGOCommands
case class Replace(filter: Bson, replacement: Document, options: Option[Any] = None) extends MGOCommands
case class Update(filter: Bson, update: Bson, options: Option[Any] = None, onlyOne: Boolean = false) extends MGOCommands
case class BulkWrite(commands: List[WriteModel[Document]], options: Option[Any] = None) extends MGOCommands
}
object MGOAdmins {
case class DropCollection(collName: String) extends MGOCommands
case class CreateCollection(collName: String, options: Option[Any] = None) extends MGOCommands
case class ListCollection(dbName: String) extends MGOCommands
case class CreateView(viewName: String, viewOn: String, pipeline: Seq[Bson], options: Option[Any] = None) extends MGOCommands
case class CreateIndex(key: Bson, options: Option[Any] = None) extends MGOCommands
case class DropIndexByName(indexName: String, options: Option[Any] = None) extends MGOCommands
case class DropIndexByKey(key: Bson, options: Option[Any] = None) extends MGOCommands
case class DropAllIndexes(options: Option[Any] = None) extends MGOCommands
}
case class MGOContext(
dbName: String,
collName: String,
actionType: MGO_ACTION_TYPE = MGO_QUERY,
action: Option[MGOCommands] = None
) {
ctx =>
def setDbName(name: String): MGOContext = ctx.copy(dbName = name)
def setCollName(name: String): MGOContext = ctx.copy(collName = name)
def setActionType(at: MGO_ACTION_TYPE): MGOContext = ctx.copy(actionType = at)
def setCommand(cmd: MGOCommands): MGOContext = ctx.copy(action = Some(cmd))
}
object MGOContext {
def apply(db: String, coll: String) = new MGOContext(db, coll)
}
case class MGOBatContext(contexts: Seq[MGOContext], tx: Boolean = false) {
ctxs =>
def setTx(txopt: Boolean): MGOBatContext = ctxs.copy(tx = txopt)
def appendContext(ctx: MGOContext): MGOBatContext =
ctxs.copy(contexts = contexts :+ ctx)
}
object MGOBatContext {
def apply(ctxs: Seq[MGOContext], tx: Boolean = false) = new MGOBatContext(ctxs,tx)
}
type MGODate = java.util.Date
def mgoDate(yyyy: Int, mm: Int, dd: Int): MGODate = {
val ca = Calendar.getInstance()
ca.set(yyyy,mm,dd)
ca.getTime()
}
def mgoDateTime(yyyy: Int, mm: Int, dd: Int, hr: Int, min: Int, sec: Int): MGODate = {
val ca = Calendar.getInstance()
ca.set(yyyy,mm,dd,hr,min,sec)
ca.getTime()
}
def mgoDateTimeNow: MGODate = {
val ca = Calendar.getInstance()
ca.getTime
}
def mgoDateToString(dt: MGODate, formatString: String): String = {
val fmt= new SimpleDateFormat(formatString)
fmt.format(dt)
}
type MGOBlob = BsonBinary
type MGOArray = BsonArray
def fileToMGOBlob(fileName: String, timeOut: FiniteDuration = 60 seconds)(
implicit mat: Materializer) = FileToByteArray(fileName,timeOut)
def mgoBlobToFile(blob: MGOBlob, fileName: String)(
implicit mat: Materializer) = ByteArrayToFile(blob.getData,fileName)
def mgoGetStringOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getString(fieldName))
else None
}
def mgoGetIntOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getInteger(fieldName))
else None
}
def mgoGetLonggOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getLong(fieldName))
else None
}
def mgoGetDoubleOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getDouble(fieldName))
else None
}
def mgoGetBoolOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getBoolean(fieldName))
else None
}
def mgoGetDateOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
Some(doc.getDate(fieldName))
else None
}
def mgoGetBlobOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
doc.get(fieldName).asInstanceOf[Option[MGOBlob]]
else None
}
def mgoGetArrayOrNone(doc: Document, fieldName: String) = {
if (doc.keySet.contains(fieldName))
doc.get(fieldName).asInstanceOf[Option[MGOArray]]
else None
}
def mgoArrayToDocumentList(arr: MGOArray): scala.collection.immutable.List[org.bson.BsonDocument] = {
(arr.getValues.asScala.toList)
.asInstanceOf[scala.collection.immutable.List[org.bson.BsonDocument]]
}
type MGOFilterResult = FindObservable[Document] => FindObservable[Document]
}
object MGOEngine extends LogSupport {
import MGOContext._
import MGOCommands._
import MGOAdmins._
object TxUpdateMode {
private def mgoTxUpdate(ctxs: MGOBatContext, observable: SingleObservable[ClientSession])(
implicit client: MongoClient, ec: ExecutionContext): SingleObservable[ClientSession] = {
log.info(s"mgoTxUpdate> calling ...")
observable.map(clientSession => {
val transactionOptions =
TransactionOptions.builder()
.readConcern(ReadConcern.SNAPSHOT)
.writeConcern(WriteConcern.MAJORITY).build()
clientSession.startTransaction(transactionOptions)
val fut = Future.traverse(ctxs.contexts) { ctx =>
mgoUpdateObservable[Completed](ctx).map(identity).toFuture()
}
Await.ready(fut, 3 seconds)
clientSession
})
}
private def commitAndRetry(observable: SingleObservable[Completed]): SingleObservable[Completed] = {
log.info(s"commitAndRetry> calling ...")
observable.recoverWith({
case e: MongoException if e.hasErrorLabel(MongoException.UNKNOWN_TRANSACTION_COMMIT_RESULT_LABEL) => {
log.warn("commitAndRetry> UnknownTransactionCommitResult, retrying commit operation ...")
commitAndRetry(observable)
}
case e: Exception => {
log.error(s"commitAndRetry> Exception during commit ...: $e")
throw e
}
})
}
private def runTransactionAndRetry(observable: SingleObservable[Completed]): SingleObservable[Completed] = {
log.info(s"runTransactionAndRetry> calling ...")
observable.recoverWith({
case e: MongoException if e.hasErrorLabel(MongoException.TRANSIENT_TRANSACTION_ERROR_LABEL) => {
log.warn("runTransactionAndRetry> TransientTransactionError, aborting transaction and retrying ...")
runTransactionAndRetry(observable)
}
})
}
def mgoTxBatch(ctxs: MGOBatContext)(
implicit client: MongoClient, ec: ExecutionContext): Future[Completed] = {
log.info(s"mgoTxBatch> MGOBatContext: ${ctxs}")
val updateObservable: Observable[ClientSession] = mgoTxUpdate(ctxs, client.startSession())
val commitTransactionObservable: SingleObservable[Completed] =
updateObservable.flatMap(clientSession => clientSession.commitTransaction())
val commitAndRetryObservable: SingleObservable[Completed] = commitAndRetry(commitTransactionObservable)
runTransactionAndRetry(commitAndRetryObservable)
}.toFuture()
}
def mgoUpdateBatch(ctxs: MGOBatContext)(implicit client: MongoClient, ec: ExecutionContext): Future[Completed] = {
log.info(s"mgoUpdateBatch> MGOBatContext: ${ctxs}")
if (ctxs.tx) {
TxUpdateMode.mgoTxBatch(ctxs)
} else {
val fut = Future.traverse(ctxs.contexts) { ctx =>
mgoUpdate[Completed](ctx).map(identity) }
Await.ready(fut, 3 seconds)
Future.successful(new Completed)
}
}
// T => FindIterable e.g List[Document]
def mgoQuery[T](ctx: MGOContext, Converter: Option[Document => Any] = None)(implicit client: MongoClient): Future[T] = {
log.info(s"mgoQuery> MGOContext: ${ctx}")
val db = client.getDatabase(ctx.dbName)
val coll = db.getCollection(ctx.collName)
if ( ctx.action == None) {
log.error(s"mgoQuery> uery action cannot be null!")
throw new IllegalArgumentException("query action cannot be null!")
}
ctx.action.get match {
/* count */
case Count(Some(filter), Some(opt)) => //SingleObservable
coll.countDocuments(filter, opt.asInstanceOf[CountOptions])
.toFuture().asInstanceOf[Future[T]]
case Count(Some(filter), None) => //SingleObservable
coll.countDocuments(filter).toFuture()
.asInstanceOf[Future[T]]
case Count(None, None) => //SingleObservable
coll.countDocuments().toFuture()
.asInstanceOf[Future[T]]
/* distinct */
case Distict(field, Some(filter)) => //DistinctObservable
coll.distinct(field, filter).toFuture()
.asInstanceOf[Future[T]]
case Distict(field, None) => //DistinctObservable
coll.distinct((field)).toFuture()
.asInstanceOf[Future[T]]
/* find */
case Find(None, None, false) => //FindObservable
if (Converter == None) coll.find().toFuture().asInstanceOf[Future[T]]
else coll.find().map(Converter.get).toFuture().asInstanceOf[Future[T]]
case Find(None, None, true) => //FindObservable
if (Converter == None) coll.find().first().head().asInstanceOf[Future[T]]
else coll.find().first().map(Converter.get).head().asInstanceOf[Future[T]]
case Find(Some(filter), None, false) => //FindObservable
if (Converter == None) coll.find(filter).toFuture().asInstanceOf[Future[T]]
else coll.find(filter).map(Converter.get).toFuture().asInstanceOf[Future[T]]
case Find(Some(filter), None, true) => //FindObservable
if (Converter == None) coll.find(filter).first().head().asInstanceOf[Future[T]]
else coll.find(filter).first().map(Converter.get).head().asInstanceOf[Future[T]]
case Find(None, Some(next), _) => //FindObservable
if (Converter == None) next(coll.find[Document]()).toFuture().asInstanceOf[Future[T]]
else next(coll.find[Document]()).map(Converter.get).toFuture().asInstanceOf[Future[T]]
case Find(Some(filter), Some(next), _) => //FindObservable
if (Converter == None) next(coll.find[Document](filter)).toFuture().asInstanceOf[Future[T]]
else next(coll.find[Document](filter)).map(Converter.get).toFuture().asInstanceOf[Future[T]]
/* aggregate AggregateObservable*/
case Aggregate(pline) => coll.aggregate(pline).toFuture().asInstanceOf[Future[T]]
/* mapReduce MapReduceObservable*/
case MapReduce(mf, rf) => coll.mapReduce(mf, rf).toFuture().asInstanceOf[Future[T]]
/* list collection */
case ListCollection(dbName) => //ListConllectionObservable
client.getDatabase(dbName).listCollections().toFuture().asInstanceOf[Future[T]]
}
}
//T => Completed, result.UpdateResult, result.DeleteResult
def mgoUpdate[T](ctx: MGOContext)(implicit client: MongoClient): Future[T] =
mgoUpdateObservable[T](ctx).toFuture()
def mgoUpdateObservable[T](ctx: MGOContext)(implicit client: MongoClient): SingleObservable[T] = {
log.info(s"mgoUpdateObservable> MGOContext: ${ctx}")
val db = client.getDatabase(ctx.dbName)
val coll = db.getCollection(ctx.collName)
if ( ctx.action == None) {
log.error(s"mgoUpdateObservable> uery action cannot be null!")
throw new IllegalArgumentException("query action cannot be null!")
}
ctx.action.get match {
/* insert */
case Insert(docs, Some(opt)) => //SingleObservable[Completed]
if (docs.size > 1)
coll.insertMany(docs, opt.asInstanceOf[InsertManyOptions]).asInstanceOf[SingleObservable[T]]
else coll.insertOne(docs.head, opt.asInstanceOf[InsertOneOptions]).asInstanceOf[SingleObservable[T]]
case Insert(docs, None) => //SingleObservable
if (docs.size > 1) coll.insertMany(docs).asInstanceOf[SingleObservable[T]]
else coll.insertOne(docs.head).asInstanceOf[SingleObservable[T]]
/* delete */
case Delete(filter, None, onlyOne) => //SingleObservable
if (onlyOne) coll.deleteOne(filter).asInstanceOf[SingleObservable[T]]
else coll.deleteMany(filter).asInstanceOf[SingleObservable[T]]
case Delete(filter, Some(opt), onlyOne) => //SingleObservable
if (onlyOne) coll.deleteOne(filter, opt.asInstanceOf[DeleteOptions]).asInstanceOf[SingleObservable[T]]
else coll.deleteMany(filter, opt.asInstanceOf[DeleteOptions]).asInstanceOf[SingleObservable[T]]
/* replace */
case Replace(filter, replacement, None) => //SingleObservable
coll.replaceOne(filter, replacement).asInstanceOf[SingleObservable[T]]
case Replace(filter, replacement, Some(opt)) => //SingleObservable
coll.replaceOne(filter, replacement, opt.asInstanceOf[UpdateOptions]).asInstanceOf[SingleObservable[T]]
/* update */
case Update(filter, update, None, onlyOne) => //SingleObservable
if (onlyOne) coll.updateOne(filter, update).asInstanceOf[SingleObservable[T]]
else coll.updateMany(filter, update).asInstanceOf[SingleObservable[T]]
case Update(filter, update, Some(opt), onlyOne) => //SingleObservable
if (onlyOne) coll.updateOne(filter, update, opt.asInstanceOf[UpdateOptions]).asInstanceOf[SingleObservable[T]]
else coll.updateMany(filter, update, opt.asInstanceOf[UpdateOptions]).asInstanceOf[SingleObservable[T]]
/* bulkWrite */
case BulkWrite(commands, None) => //SingleObservable
coll.bulkWrite(commands).asInstanceOf[SingleObservable[T]]
case BulkWrite(commands, Some(opt)) => //SingleObservable
coll.bulkWrite(commands, opt.asInstanceOf[BulkWriteOptions]).asInstanceOf[SingleObservable[T]]
}
}
def mgoAdmin(ctx: MGOContext)(implicit client: MongoClient): SingleObservable[Completed] = {
log.info(s"mgoAdmin> MGOContext: ${ctx}")
val db = client.getDatabase(ctx.dbName)
val coll = db.getCollection(ctx.collName)
if ( ctx.action == None) {
log.error(s"mgoAdmin> uery action cannot be null!")
throw new IllegalArgumentException("query action cannot be null!")
}
ctx.action.get match {
/* drop collection */
case DropCollection(collName) => //SingleObservable
val coll = db.getCollection(collName)
coll.drop()
/* create collection */
case CreateCollection(collName, None) => //SingleObservable
db.createCollection(collName)
case CreateCollection(collName, Some(opt)) => //SingleObservable
db.createCollection(collName, opt.asInstanceOf[CreateCollectionOptions])
/* list collection
case ListCollection(dbName) => //ListConllectionObservable
client.getDatabase(dbName).listCollections().toFuture().asInstanceOf[Future[T]]
*/
/* create view */
case CreateView(viewName, viewOn, pline, None) => //SingleObservable
db.createView(viewName, viewOn, pline)
case CreateView(viewName, viewOn, pline, Some(opt)) => //SingleObservable
db.createView(viewName, viewOn, pline, opt.asInstanceOf[CreateViewOptions])
/* create index */
case CreateIndex(key, None) => //SingleObservable
coll.createIndex(key).asInstanceOf[SingleObservable[Completed]]
case CreateIndex(key, Some(opt)) => //SingleObservable
coll.createIndex(key, opt.asInstanceOf[IndexOptions]).asInstanceOf[SingleObservable[Completed]]
/* drop index */
case DropIndexByName(indexName, None) => //SingleObservable
coll.dropIndex(indexName)
case DropIndexByName(indexName, Some(opt)) => //SingleObservable
coll.dropIndex(indexName, opt.asInstanceOf[DropIndexOptions])
case DropIndexByKey(key, None) => //SingleObservable
coll.dropIndex(key)
case DropIndexByKey(key, Some(opt)) => //SingleObservable
coll.dropIndex(key, opt.asInstanceOf[DropIndexOptions])
case DropAllIndexes(None) => //SingleObservable
coll.dropIndexes()
case DropAllIndexes(Some(opt)) => //SingleObservable
coll.dropIndexes(opt.asInstanceOf[DropIndexOptions])
}
}
/*
def mgoExecute[T](ctx: MGOContext)(implicit client: MongoClient): Future[T] = {
val db = client.getDatabase(ctx.dbName)
val coll = db.getCollection(ctx.collName)
ctx.action match {
/* count */
case Count(Some(filter), Some(opt)) => //SingleObservable
coll.countDocuments(filter, opt.asInstanceOf[CountOptions])
.toFuture().asInstanceOf[Future[T]]
case Count(Some(filter), None) => //SingleObservable
coll.countDocuments(filter).toFuture()
.asInstanceOf[Future[T]]
case Count(None, None) => //SingleObservable
coll.countDocuments().toFuture()
.asInstanceOf[Future[T]]
/* distinct */
case Distict(field, Some(filter)) => //DistinctObservable
coll.distinct(field, filter).toFuture()
.asInstanceOf[Future[T]]
case Distict(field, None) => //DistinctObservable
coll.distinct((field)).toFuture()
.asInstanceOf[Future[T]]
/* find */
case Find(None, None, optConv, false) => //FindObservable
if (optConv == None) coll.find().toFuture().asInstanceOf[Future[T]]
else coll.find().map(optConv.get).toFuture().asInstanceOf[Future[T]]
case Find(None, None, optConv, true) => //FindObservable
if (optConv == None) coll.find().first().head().asInstanceOf[Future[T]]
else coll.find().first().map(optConv.get).head().asInstanceOf[Future[T]]
case Find(Some(filter), None, optConv, false) => //FindObservable
if (optConv == None) coll.find(filter).toFuture().asInstanceOf[Future[T]]
else coll.find(filter).map(optConv.get).toFuture().asInstanceOf[Future[T]]
case Find(Some(filter), None, optConv, true) => //FindObservable
if (optConv == None) coll.find(filter).first().head().asInstanceOf[Future[T]]
else coll.find(filter).first().map(optConv.get).head().asInstanceOf[Future[T]]
case Find(None, Some(next), optConv, _) => //FindObservable
if (optConv == None) next(coll.find[Document]()).toFuture().asInstanceOf[Future[T]]
else next(coll.find[Document]()).map(optConv.get).toFuture().asInstanceOf[Future[T]]
case Find(Some(filter), Some(next), optConv, _) => //FindObservable
if (optConv == None) next(coll.find[Document](filter)).toFuture().asInstanceOf[Future[T]]
else next(coll.find[Document](filter)).map(optConv.get).toFuture().asInstanceOf[Future[T]]
/* aggregate AggregateObservable*/
case Aggregate(pline) => coll.aggregate(pline).toFuture().asInstanceOf[Future[T]]
/* mapReduce MapReduceObservable*/
case MapReduce(mf, rf) => coll.mapReduce(mf, rf).toFuture().asInstanceOf[Future[T]]
/* insert */
case Insert(docs, Some(opt)) => //SingleObservable[Completed]
if (docs.size > 1) coll.insertMany(docs, opt.asInstanceOf[InsertManyOptions]).toFuture()
.asInstanceOf[Future[T]]
else coll.insertOne(docs.head, opt.asInstanceOf[InsertOneOptions]).toFuture()
.asInstanceOf[Future[T]]
case Insert(docs, None) => //SingleObservable
if (docs.size > 1) coll.insertMany(docs).toFuture().asInstanceOf[Future[T]]
else coll.insertOne(docs.head).toFuture().asInstanceOf[Future[T]]
/* delete */
case Delete(filter, None, onlyOne) => //SingleObservable
if (onlyOne) coll.deleteOne(filter).toFuture().asInstanceOf[Future[T]]
else coll.deleteMany(filter).toFuture().asInstanceOf[Future[T]]
case Delete(filter, Some(opt), onlyOne) => //SingleObservable
if (onlyOne) coll.deleteOne(filter, opt.asInstanceOf[DeleteOptions]).toFuture().asInstanceOf[Future[T]]
else coll.deleteMany(filter, opt.asInstanceOf[DeleteOptions]).toFuture().asInstanceOf[Future[T]]
/* replace */
case Replace(filter, replacement, None) => //SingleObservable
coll.replaceOne(filter, replacement).toFuture().asInstanceOf[Future[T]]
case Replace(filter, replacement, Some(opt)) => //SingleObservable
coll.replaceOne(filter, replacement, opt.asInstanceOf[UpdateOptions]).toFuture().asInstanceOf[Future[T]]
/* update */
case Update(filter, update, None, onlyOne) => //SingleObservable
if (onlyOne) coll.updateOne(filter, update).toFuture().asInstanceOf[Future[T]]
else coll.updateMany(filter, update).toFuture().asInstanceOf[Future[T]]
case Update(filter, update, Some(opt), onlyOne) => //SingleObservable
if (onlyOne) coll.updateOne(filter, update, opt.asInstanceOf[UpdateOptions]).toFuture().asInstanceOf[Future[T]]
else coll.updateMany(filter, update, opt.asInstanceOf[UpdateOptions]).toFuture().asInstanceOf[Future[T]]
/* bulkWrite */
case BulkWrite(commands, None) => //SingleObservable
coll.bulkWrite(commands).toFuture().asInstanceOf[Future[T]]
case BulkWrite(commands, Some(opt)) => //SingleObservable
coll.bulkWrite(commands, opt.asInstanceOf[BulkWriteOptions]).toFuture().asInstanceOf[Future[T]]
/* drop collection */
case DropCollection(collName) => //SingleObservable
val coll = db.getCollection(collName)
coll.drop().toFuture().asInstanceOf[Future[T]]
/* create collection */
case CreateCollection(collName, None) => //SingleObservable
db.createCollection(collName).toFuture().asInstanceOf[Future[T]]
case CreateCollection(collName, Some(opt)) => //SingleObservable
db.createCollection(collName, opt.asInstanceOf[CreateCollectionOptions]).toFuture().asInstanceOf[Future[T]]
/* list collection */
case ListCollection(dbName) => //ListConllectionObservable
client.getDatabase(dbName).listCollections().toFuture().asInstanceOf[Future[T]]
/* create view */
case CreateView(viewName, viewOn, pline, None) => //SingleObservable
db.createView(viewName, viewOn, pline).toFuture().asInstanceOf[Future[T]]
case CreateView(viewName, viewOn, pline, Some(opt)) => //SingleObservable
db.createView(viewName, viewOn, pline, opt.asInstanceOf[CreateViewOptions]).toFuture().asInstanceOf[Future[T]]
/* create index */
case CreateIndex(key, None) => //SingleObservable
coll.createIndex(key).toFuture().asInstanceOf[Future[T]]
case CreateIndex(key, Some(opt)) => //SingleObservable
coll.createIndex(key, opt.asInstanceOf[IndexOptions]).toFuture().asInstanceOf[Future[T]]
/* drop index */
case DropIndexByName(indexName, None) => //SingleObservable
coll.dropIndex(indexName).toFuture().asInstanceOf[Future[T]]
case DropIndexByName(indexName, Some(opt)) => //SingleObservable
coll.dropIndex(indexName, opt.asInstanceOf[DropIndexOptions]).toFuture().asInstanceOf[Future[T]]
case DropIndexByKey(key, None) => //SingleObservable
coll.dropIndex(key).toFuture().asInstanceOf[Future[T]]
case DropIndexByKey(key, Some(opt)) => //SingleObservable
coll.dropIndex(key, opt.asInstanceOf[DropIndexOptions]).toFuture().asInstanceOf[Future[T]]
case DropAllIndexes(None) => //SingleObservable
coll.dropIndexes().toFuture().asInstanceOf[Future[T]]
case DropAllIndexes(Some(opt)) => //SingleObservable
coll.dropIndexes(opt.asInstanceOf[DropIndexOptions]).toFuture().asInstanceOf[Future[T]]
}
}
*/
def mongoStream(ctx: MGOContext)(
implicit client: MongoClient, ec: ExecutionContextExecutor): Source[Document, NotUsed] = {
log.info(s"mongoStream> MGOContext: ${ctx}")
val db = client.getDatabase(ctx.dbName)
val coll = db.getCollection(ctx.collName)
if ( ctx.action == None) {
log.error(s"mongoStream> uery action cannot be null!")
throw new IllegalArgumentException("query action cannot be null!")
}
ctx.action.get match {
case DocumentStream(None, None) =>
MongoSource(coll.find())
case DocumentStream(Some(filter), None) =>
MongoSource(coll.find(filter))
case DocumentStream(None, Some(next)) =>
MongoSource(next(coll.find()))
case DocumentStream(Some(filter), Some(next)) =>
MongoSource(next(coll.find(filter)))
}
}
}
object MongoActionStream {
import MGOContext._
case class StreamingInsert[A](dbName: String,
collName: String,
converter: A => Document,
parallelism: Int = 1
) extends MGOCommands
case class StreamingDelete[A](dbName: String,
collName: String,
toFilter: A => Bson,
parallelism: Int = 1,
justOne: Boolean = false
) extends MGOCommands
case class StreamingUpdate[A](dbName: String,
collName: String,
toFilter: A => Bson,
toUpdate: A => Bson,
parallelism: Int = 1,
justOne: Boolean = false
) extends MGOCommands
case class InsertAction[A](ctx: StreamingInsert[A])(
implicit mongoClient: MongoClient) {
val database = mongoClient.getDatabase(ctx.dbName)
val collection = database.getCollection(ctx.collName)
def performOnRow(implicit ec: ExecutionContext): Flow[A, Document, NotUsed] =
Flow[A].map(ctx.converter)
.mapAsync(ctx.parallelism)(doc => collection.insertOne(doc).toFuture().map(_ => doc))
}
case class UpdateAction[A](ctx: StreamingUpdate[A])(
implicit mongoClient: MongoClient) {
val database = mongoClient.getDatabase(ctx.dbName)
val collection = database.getCollection(ctx.collName)
def performOnRow(implicit ec: ExecutionContext): Flow[A, A, NotUsed] =
if (ctx.justOne) {
Flow[A]
.mapAsync(ctx.parallelism)(a =>
collection.updateOne(ctx.toFilter(a), ctx.toUpdate(a)).toFuture().map(_ => a))
} else
Flow[A]
.mapAsync(ctx.parallelism)(a =>
collection.updateMany(ctx.toFilter(a), ctx.toUpdate(a)).toFuture().map(_ => a))
}
case class DeleteAction[A](ctx: StreamingDelete[A])(
implicit mongoClient: MongoClient) {
val database = mongoClient.getDatabase(ctx.dbName)
val collection = database.getCollection(ctx.collName)
def performOnRow(implicit ec: ExecutionContext): Flow[A, A, NotUsed] =
if (ctx.justOne) {
Flow[A]
.mapAsync(ctx.parallelism)(a =>
collection.deleteOne(ctx.toFilter(a)).toFuture().map(_ => a))
} else
Flow[A]
.mapAsync(ctx.parallelism)(a =>
collection.deleteMany(ctx.toFilter(a)).toFuture().map(_ => a))
}
}
object MGOHelpers {
implicit class DocumentObservable[C](val observable: Observable[Document]) extends ImplicitObservable[Document] {
override val converter: (Document) => String = (doc) => doc.toJson
}
implicit class GenericObservable[C](val observable: Observable[C]) extends ImplicitObservable[C] {
override val converter: (C) => String = (doc) => doc.toString
}
trait ImplicitObservable[C] {
val observable: Observable[C]
val converter: (C) => String
def results(): Seq[C] = Await.result(observable.toFuture(), 10 seconds)
def headResult() = Await.result(observable.head(), 10 seconds)
def printResults(initial: String = ""): Unit = {
if (initial.length > 0) print(initial)
results().foreach(res => println(converter(res)))
}
def printHeadResult(initial: String = ""): Unit = println(s"${initial}${converter(headResult())}")
}
def getResult[T](fut: Future[T], timeOut: Duration = 1 second): T = {
Await.result(fut, timeOut)
}
def getResults[T](fut: Future[Iterable[T]], timeOut: Duration = 1 second): Iterable[T] = {
Await.result(fut, timeOut)
}
import monix.eval.Task
import monix.execution.Scheduler.Implicits.global
final class FutureToTask[A](x: => Future[A]) {
def asTask: Task[A] = Task.deferFuture[A](x)
}
final class TaskToFuture[A](x: => Task[A]) {
def asFuture: Future[A] = x.runAsync
}
}
MgoProtoConversion.scala
package sdp.mongo.engine
import org.mongodb.scala.bson.collection.immutable.Document
import org.bson.conversions.Bson
import sdp.grpc.services._
import protobuf.bytes.Converter._
import com.google.protobuf.ByteString
import MGOContext._
import MGOAdmins._
import MGOCommands._
import org.bson.BsonDocument
import org.bson.codecs.configuration.CodecRegistry
import org.mongodb.scala.bson.codecs.DEFAULT_CODEC_REGISTRY
import org.mongodb.scala.FindObservable
object MgoProtoConvertion {
/* org.mongodb.scala.FindObservable
import com.mongodb.async.client.FindIterable
val resultDocType = FindIterable[Document]
val resultOption = FindObservable(resultDocType)
.maxScan(...)
.limit(...)
.sort(...)
.project(...) */
type FOD_TYPE = Int
val FOD_FIRST = 0 //def first(): SingleObservable[TResult], return the first item
val FOD_FILTER = 1 //def filter(filter: Bson): FindObservable[TResult]
val FOD_LIMIT = 2 //def limit(limit: Int): FindObservable[TResult]
val FOD_SKIP = 3 //def skip(skip: Int): FindObservable[TResult]
val FOD_PROJECTION = 4 //def projection(projection: Bson): FindObservable[TResult]
//Sets a document describing the fields to return for all matching documents
val FOD_SORT = 5 //def sort(sort: Bson): FindObservable[TResult]
val FOD_PARTIAL = 6 //def partial(partial: Boolean): FindObservable[TResult]
//Get partial results from a sharded cluster if one or more shards are unreachable (instead of throwing an error)
val FOD_CURSORTYPE = 7 //def cursorType(cursorType: CursorType): FindObservable[TResult]
//Sets the cursor type
val FOD_HINT = 8 //def hint(hint: Bson): FindObservable[TResult]
//Sets the hint for which index to use. A null value means no hint is set
val FOD_MAX = 9 //def max(max: Bson): FindObservable[TResult]
//Sets the exclusive upper bound for a specific index. A null value means no max is set
val FOD_MIN = 10 //def min(min: Bson): FindObservable[TResult]
//Sets the minimum inclusive lower bound for a specific index. A null value means no max is set
val FOD_RETURNKEY = 11 //def returnKey(returnKey: Boolean): FindObservable[TResult]
//Sets the returnKey. If true the find operation will return only the index keys in the resulting documents
val FOD_SHOWRECORDID=12 //def showRecordId(showRecordId: Boolean): FindObservable[TResult]
//Sets the showRecordId. Set to true to add a field `$recordId` to the returned documents
case class ResultOptions(
optType: FOD_TYPE,
bsonParam: Option[Bson] = None,
valueParam: Int = 0 ){
def toProto = new sdp.grpc.services.ResultTransformer(
optType = this.optType,
bsonParam = this.bsonParam.map {b => sdp.grpc.services.MGOBson(marshal(b))},
valueParam = this.valueParam
)
def toFindObservable: FindObservable[Document] => FindObservable[Document] = find => {
optType match {
case FOD_FIRST => find
case FOD_FILTER => find.filter(bsonParam.get)
case FOD_LIMIT => find.limit(valueParam)
case FOD_SKIP => find.skip(valueParam)
case FOD_PROJECTION => find.projection(bsonParam.get)
case FOD_SORT => find.sort(bsonParam.get)
case FOD_PARTIAL => find.partial(valueParam != 0)
case FOD_CURSORTYPE => find
case FOD_HINT => find.hint(bsonParam.get)
case FOD_MAX => find.max(bsonParam.get)
case FOD_MIN => find.min(bsonParam.get)
case FOD_RETURNKEY => find.returnKey(valueParam != 0)
case FOD_SHOWRECORDID => find.showRecordId(valueParam != 0)
}
}
}
object ResultOptions {
def fromProto(msg: sdp.grpc.services.ResultTransformer) = new ResultOptions(
optType = msg.optType,
bsonParam = msg.bsonParam.map(b => unmarshal[Bson](b.bson)),
valueParam = msg.valueParam
)
}
type MGO_COMMAND_TYPE = Int
val MGO_COMMAND_FIND = 0
val MGO_COMMAND_COUNT = 20
val MGO_COMMAND_DISTICT = 21
val MGO_COMMAND_DOCUMENTSTREAM = 1
val MGO_COMMAND_AGGREGATE = 2
val MGO_COMMAND_INSERT = 3
val MGO_COMMAND_DELETE = 4
val MGO_COMMAND_REPLACE = 5
val MGO_COMMAND_UPDATE = 6
val MGO_ADMIN_DROPCOLLECTION = 8
val MGO_ADMIN_CREATECOLLECTION = 9
val MGO_ADMIN_LISTCOLLECTION = 10
val MGO_ADMIN_CREATEVIEW = 11
val MGO_ADMIN_CREATEINDEX = 12
val MGO_ADMIN_DROPINDEXBYNAME = 13
val MGO_ADMIN_DROPINDEXBYKEY = 14
val MGO_ADMIN_DROPALLINDEXES = 15
case class MGOAdminCtx(
tarName: String = "",
bsonParam: Seq[Bson] = Nil,
options: Option[Any] = None,
objName: String = ""
){
def toProto = sdp.grpc.services.MGOAdminOptons(
tarName = this.tarName,
bsonParam = this.bsonParam.map {b => sdp.grpc.services.MGOBson(marshal(b))},
objName = this.objName,
options = this.options.map(b => OptionAny(marshal(b)))
)
}
object MGOAdminCtx {
def fromProto(msg: sdp.grpc.services.MGOAdminOptons) = new MGOAdminCtx(
tarName = msg.tarName,
bsonParam = msg.bsonParam.map(b => unmarshal[Bson](b.bson))
)
}
case class MGOProtoMsg(
dbName: String = "",
collName: String = "",
commandType: MGO_COMMAND_TYPE,
bsonParam: Seq[Bson] = Nil,
resultOptions: Seq[ResultOptions] = Nil,
options: ByteString = com.google.protobuf.ByteString.EMPTY,
documents: Seq[Document] = Nil,
only: Boolean = false,
adminOptions: Option[MGOAdminCtx] = None
){
def toProto = new sdp.grpc.services.MGOOperations(
dbName = this.dbName,
collName = this.collName,
commandType = this.commandType,
bsonParam = this.bsonParam.map(bsonToProto),
resultOptions = this.resultOptions.map(_.toProto),
documents = this.documents.map(d => sdp.grpc.services.MGODocument(marshal(d))),
only = Some(this.only),
adminOptions = this.adminOptions.map(_.toProto)
)
}
object MGOProtoMsg {
def fromProto(msg: sdp.grpc.services.MGOOperations) = new MGOProtoMsg(
dbName = msg.dbName,
collName = msg.collName,
commandType = msg.commandType,
bsonParam = msg.bsonParam.map(protoToBson),
resultOptions = msg.resultOptions.map(r => ResultOptions.fromProto(r))
)
}
def bsonToProto(bson: Bson) =
MGOBson(marshal(bson.toBsonDocument(
classOf[org.mongodb.scala.bson.collection.immutable.Document],DEFAULT_CODEC_REGISTRY)))
def protoToBson(proto: MGOBson): Bson = new Bson {
val bsdoc = unmarshal[BsonDocument](proto.bson)
override def toBsonDocument[TDocument](documentClass: Class[TDocument], codecRegistry: CodecRegistry): BsonDocument = bsdoc
}
def CtxFromProto(proto: MGOOperations): MGOContext = proto.commandType match {
case MGO_COMMAND_FIND => {
var ctx = new MGOContext(
dbName = proto.dbName,
collName = proto.collName,
actionType = MGO_QUERY,
action = Some(Find())
)
def toResultTransformer(rts: Seq[ResultTransformer]): FindObservable[Document] => FindObservable[Document] = findObj =>
rts.foldRight(findObj)((a,b) => ResultOptions.fromProto(a).toFindObservable(b))
(proto.bsonParam, proto.resultOptions, proto.only) match {
case (Nil, Nil, None) => ctx
case (Nil, Nil, Some(b)) => ctx.setCommand(Find(None, None, b))
case (bp,Nil,None) => ctx.setCommand(
Find(Some(protoToBson(bp.head)),None,false))
case (bp,Nil,Some(b)) => ctx.setCommand(
Find(Some(protoToBson(bp.head)),None,b))
case (bp,fo,None) => {
ctx.setCommand(
Find(Some(protoToBson(bp.head)),Some(toResultTransformer(fo)),false))
}
case (bp,fo,Some(b)) => {
ctx.setCommand(
Find(Some(protoToBson(bp.head)),Some(toResultTransformer(fo)),b))
}
case _ => ctx
}
}
}
}
BytesConverter.scala
package protobuf.bytes
import java.io.{ByteArrayInputStream,ByteArrayOutputStream,ObjectInputStream,ObjectOutputStream}
import com.google.protobuf.ByteString
object Converter {
def marshal(value: Any): ByteString = {
val stream: ByteArrayOutputStream = new ByteArrayOutputStream()
val oos = new ObjectOutputStream(stream)
oos.writeObject(value)
oos.close()
ByteString.copyFrom(stream.toByteArray())
}
def unmarshal[A](bytes: ByteString): A = {
val ois = new ObjectInputStream(new ByteArrayInputStream(bytes.toByteArray))
val value = ois.readObject()
ois.close()
value.asInstanceOf[A]
}
}
FindDemo.scala
package demo.sdp.mgo.localapp
import akka.actor.ActorSystem
import akka.stream.ActorMaterializer
import org.mongodb.scala._
import scala.util._
import scala.collection.JavaConverters._
import sdp.mongo.engine._
import org.mongodb.scala.model._
import akka.stream.scaladsl.{Sink, Source}
import org.bson.codecs.configuration.CodecRegistry
import org.mongodb.scala.bson.{BsonDocument, BsonValue}
import scalikejdbc._
import sdp.jdbc.engine._
import sdp.jdbc.config._
object ProtoTests extends App {
import MGOContext._
import MGOEngine._
import MGOCommands._
import MongoActionStream._
import MgoProtoConvertion._
import org.mongodb.scala.model._
import Projections._
import Filters._
implicit val system = ActorSystem()
implicit val mat = ActorMaterializer()
implicit val ec = system.dispatcher
val clientSettings: MongoClientSettings = MongoClientSettings.builder()
.applyToClusterSettings {b =>
b.hosts(List(new ServerAddress("localhost")).asJava)
}.build()
implicit val client: MongoClient = MongoClient(clientSettings)
val eqState = equal("state","California")
val proj = exclude("rowid","_id")
val rtxfmr = Seq(
ResultOptions(
optType = FOD_LIMIT,
valueParam = 3)
,ResultOptions(
optType = FOD_PROJECTION,
bsonParam = Some(proj))
)
val protoCtx = MGOProtoMsg(
dbName = "testdb",
collName = "aqmrpt",
commandType = MGO_COMMAND_FIND,
bsonParam = Seq(eqState),
resultOptions = rtxfmr
).toProto
val findCtx = CtxFromProto(protoCtx)
val futFind = mgoQuery[Seq[Document]](findCtx)
futFind.onComplete {
case Success(docs) => docs.asInstanceOf[Seq[Document]].foreach{doc => println(doc.toJson())}
case Failure(e) => println(e.getMessage)
}
scala.io.StdIn.readLine()
system.terminate()
}