1.自定义kafka组件，进行kafka初始化，以及消息处理。
/**
* @author Ly
* @create 2020/11/9 15:40
* @desc
**/
@Slf4j
public class ArgInterceptorAspect {
private KafkaTemplate kafkaTemplate;
public ArgInterceptorAspect(Class clazz) throws Exception{
//初始化kafkaTemplate
this.kafkaTemplate = new KafkaTemplate(new DefaultKafkaProducerFactory<String,String>(Config.producerProps(clazz)));
}
/**
* 处理消息
* @param args
* @throws Throwable
*/
public void handle(String args) throws Throwable{
kafkaTemplate.send(Constants.KAFKA_SKYWALKING_ARG_TOPIC,args);
}
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/**
* @author Ly
* @create 2020/11/24 10:49
* @desc
**/
@Slf4j
public class Config {
private final static Yaml yaml = new Yaml();
private final static Properties p = new Properties();
private final static Map<String,String> PROPERTIES_MAPS = Maps.newConcurrentMap();
public static Map<String,String> getPropertiesMaps(){
return PROPERTIES_MAPS;
}
public static Map<String,String> getConfigs(Class clazz) throws Exception{
return Config.initConfigurations(clazz);
}
private static Map<String,String> initConfigurations(Class clazz) throws IOException {
Reader reader = null;
Map<String,String> results = Maps.newHashMap();
Map resultMaps = Maps.newHashMap();
reader = Config.readFile(ArgInterceptorAspect.class,Constants.FILE_NAME_DEFAULT);
//读取配置文件信息 顺序：默认配置文件-> application.yml -> application.properties 相同的配置会进行覆盖
if(reader != null){
p.load(reader);
resultMaps.putAll(properties2map(p));
}
if(clazz != null){
reader = Config.readFile(clazz, Constants.FILE_NAME_PROPERTIES);
if(reader != null){
p.load(reader);
resultMaps.putAll(properties2map(p));
}
reader = Config.readFile(clazz,Constants.FILE_NAME_YML);
if(reader != null){
Map yamlConfigurationMaps = Maps.newHashMap();
YamlConvertPropertiesUtils.convert(yaml.loadAs(reader, Map.class),yamlConfigurationMaps,null);
resultMaps.putAll(yamlConfigurationMaps);
}
Config.selectConfig(resultMaps);
resultMaps.forEach((key,config)->{
String value = PropertyPlaceholderHelper.INSTANCE.parseStringValue(String.valueOf(config));
results.put(String.valueOf(key), value);
});
}
PROPERTIES_MAPS.putAll(results);
return results;
}
private static void selectConfig(final Map<String, Map<String, Object>> moduleConfiguration) {
Iterator<Map.Entry<String, Map<String, Object>>> iterator = moduleConfiguration.entrySet().iterator();
List<String> keys = PropertiesEnums.getKeys();
while(iterator.hasNext()){
Map.Entry<String, Map<String, Object>> next = iterator.next();
String key = next.getKey();
if(!keys.contains(key)){
iterator.remove();
}
}
}
/**
* 读取文件
* @param clazz
* @param fileName
* @return
* @throws FileNotFoundException
*/
private static Reader readFile(Class clazz, String fileName) throws FileNotFoundException{
URL url = clazz.getClassLoader().getResource(fileName);
if (url == null) {
log.warn("file not found: "+fileName);
return null;
}
return new InputStreamReader(clazz.getClassLoader().getResourceAsStream(fileName));
}
public static Map<String, Object> consumerProps(Class clazz) throws Exception {
Map<String, String> results = Config.getConfigs(clazz);
Map<String, Object> props = Maps.newHashMap();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, results.get(PropertiesEnums.SPRING_KAFKA_CONSUMER.getKey()));
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, results.get(PropertiesEnums.SPRING_KAFKA_ENABLE_AUTO_COMMIT_CONFIG.getKey()));
props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, results.get(PropertiesEnums.SPRING_KAFKA_AUTO_COMMIT_INTERVAL_MS_CONFIG.getKey()));
//一次拉取消息数量
props.put(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, results.get(PropertiesEnums.SPRING_KAFKA_POLLRECORDS.getKey()));
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, IntegerDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
return props;
}
public static Map<String,Object> producerProps(Class clazz) throws Exception{
Map<String, String> results = Config.getConfigs(clazz);
Map configs = Maps.newHashMap();
configs.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,results.get(PropertiesEnums.SPRING_KAFKA_PRODUCER.getKey()));
configs.put("key.deserializer", StringDeserializer.class);
configs.put("value.deserializer",StringDeserializer.class);
configs.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
configs.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,StringSerializer.class);
configs.put("group.id",results.get(PropertiesEnums.SPRING_KAFKA_GROUP_ID.getKey()));
configs.put("missing.topics.fatal",results.get(PropertiesEnums.SPRING_KAFKA_MISSING_FATAL.getKey()));
log.info("init kafka kafkaClusters:{}",results.get(PropertiesEnums.SPRING_KAFKA_PRODUCER.getKey()));
return configs;
}
/**
* 属性转换成map
* @param prop
* @return
*/
public static Map properties2map(Properties prop){
Map<Object,Object> map = new HashMap<>();
Enumeration enu = prop.keys();
while (enu.hasMoreElements()) {
Object o = enu.nextElement();
Object obj = prop.get(o);
map.put(o, obj);
}
return map;
}
}
=======================================================================================================================================================
public class PlaceholderConfigurerSupport {
/**
* Default placeholder prefix: {@value}
*/
public static final String DEFAULT_PLACEHOLDER_PREFIX = "${";
/**
* Default placeholder suffix: {@value}
*/
public static final String DEFAULT_PLACEHOLDER_SUFFIX = "}";
/**
* Default value separator: {@value}
*/
public static final String DEFAULT_VALUE_SEPARATOR = ":";
}
=======================================================================================================================================================
public enum PropertyPlaceholderHelper {
INSTANCE(
PlaceholderConfigurerSupport.DEFAULT_PLACEHOLDER_PREFIX,
PlaceholderConfigurerSupport.DEFAULT_PLACEHOLDER_SUFFIX, PlaceholderConfigurerSupport.DEFAULT_VALUE_SEPARATOR,
true
);
private final String placeholderPrefix;
private final String placeholderSuffix;
private final String simplePrefix;
private final String valueSeparator;
private final boolean ignoreUnresolvablePlaceholders;
/**
* Creates a new {@code PropertyPlaceholderHelper} that uses the supplied prefix and suffix.
*
* @param placeholderPrefix the prefix that denotes the start of a placeholder
* @param placeholderSuffix the suffix that denotes the end of a placeholder
* @param valueSeparator the separating character between the placeholder variable and the
* associated default value, if any
* @param ignoreUnresolvablePlaceholders indicates whether unresolvable placeholders should be ignored ({@code
* true}) or cause an exception ({@code false})
*/
PropertyPlaceholderHelper(String placeholderPrefix, String placeholderSuffix, String valueSeparator,
boolean ignoreUnresolvablePlaceholders) {
if (StringUtils.isEmpty(placeholderPrefix) || StringUtils.isEmpty(placeholderSuffix)) {
throw new UnsupportedOperationException("'placeholderPrefix or placeholderSuffix' must not be null");
}
final Map<String, String> wellKnownSimplePrefixes = new HashMap<String, String>(4);
wellKnownSimplePrefixes.put("}", "{");
wellKnownSimplePrefixes.put("]", "[");
wellKnownSimplePrefixes.put(")", "(");
this.placeholderPrefix = placeholderPrefix;
this.placeholderSuffix = placeholderSuffix;
String simplePrefixForSuffix = wellKnownSimplePrefixes.get(this.placeholderSuffix);
if (simplePrefixForSuffix != null && this.placeholderPrefix.endsWith(simplePrefixForSuffix)) {
this.simplePrefix = simplePrefixForSuffix;
} else {
this.simplePrefix = this.placeholderPrefix;
}
this.valueSeparator = valueSeparator;
this.ignoreUnresolvablePlaceholders = ignoreUnresolvablePlaceholders;
}
private String getConfigValue(String key, final Properties properties) {
String value = System.getProperty(key);
if (value == null) {
value = System.getenv(key);
}
if (value == null) {
value = properties.getProperty(key);
}
return value;
}
private String getConfigValue(String key, final Map properties) {
String value = System.getProperty(key);
if (value == null) {
value = System.getenv(key);
}
if (value == null) {
value = String.valueOf(properties.get(key));
}
return value;
}
private String getConfigValue(String key, String value) {
String property = System.getProperty(key);
if (StringUtils.isNotEmpty(property)) {
return property;
} else {
String env = System.getenv(key);
return StringUtils.isNotEmpty(env) ? env : value;
}
}
public String parseStringValue(String value) {
StringBuilder result = new StringBuilder(value);
int startIndex = value.indexOf(this.placeholderPrefix);
while (startIndex != -1) {
int endIndex = findPlaceholderEndIndex(result, startIndex);
if (endIndex != -1) {
String placeholder = result.substring(startIndex + this.placeholderPrefix.length(), endIndex);
// Recursive invocation, parsing placeholders contained in the placeholder key.
placeholder = parseStringValue(placeholder);
if(placeholder.indexOf(this.valueSeparator) != -1){
return this.getConfigValue(placeholder.substring(0,placeholder.indexOf(this.valueSeparator)),placeholder.substring(placeholder.indexOf(this.valueSeparator)+1));
}
return placeholder;
} else {
startIndex = -1;
}
}
return result.toString();
}
private int findPlaceholderEndIndex(CharSequence buf, int startIndex) {
int index = startIndex + this.placeholderPrefix.length();
int withinNestedPlaceholder = 0;
while (index < buf.length()) {
if (org.springframework.util.StringUtils.substringMatch(buf, index, this.placeholderSuffix)) {
if (withinNestedPlaceholder > 0) {
withinNestedPlaceholder--;
index = index + this.placeholderSuffix.length();
} else {
return index;
}
} else if (org.springframework.util.StringUtils.substringMatch(buf, index, this.simplePrefix)) {
withinNestedPlaceholder++;
index = index + this.simplePrefix.length();
} else {
index++;
}
}
return -1;
}
/**
* Strategy interface used to resolve replacement values for placeholders contained in Strings.
*/
public interface PlaceholderResolver {
/**
* Resolve the supplied placeholder name to the replacement value.
*
* @param placeholderName the name of the placeholder to resolve
* @return the replacement value, or {@code null} if no replacement is to be made
*/
String resolvePlaceholder(String placeholderName);
}
}
=======================================================================================================================================================
/**
* @author Ly
* @create 2020/11/9 15:51
* @desc
**/
public class Constants {
public static final String KAFKA_SKYWALKING_ARG_TOPIC = "kafka_skywalking_arg_topic";
public static final String FILE_NAME_PROPERTIES = "application.properties";
public static final String FILE_NAME_YML = "application.yml";
public static final String FILE_NAME_DEFAULT = "default-kafka.properties";
}
=======================================================================================================================================================
/**
* @author Ly
* @create 2020/11/20 14:48
* @desc
**/
public enum PropertiesEnums {
SPRING_KAFKA_PRODUCER("SPRING_KAFKA_PRODUCER","spring.kafka.producer.bootstrap-servers"),
SPRING_KAFKA_CONSUMER("SPRING_KAFKA_CONSUMER","spring.kafka.consumer.bootstrap-servers"),
SPRING_KAFKA_GROUP_ID("SPRING_KAFKA_GROUP_ID","spring.kafka.consumer.group-id"),
SPRING_KAFKA_MISSING_FATAL("SPRING_KAFKA_MISSING_FATAL","spring.kafka.listener.missing-topics-fatal"),
SPRING_KAFKA_CONCURRENCY("SPRING_KAFKA_CONCURRENCY","spring.kafka.default.concurrency"),
SPRING_KAFKA_PARTITIONS("SPRING_KAFKA_PARTITIONS","spring.kafka.default.partitions"),
SPRING_KAFKA_POLLRECORDS("SPRING_KAFKA_POLLRECORDS","spring.kafka.default.poll_records"),
SPRING_KAFKA_AUTO_COMMIT_INTERVAL_MS_CONFIG("SPRING_KAFKA_AUTO_COMMIT_INTERVAL_MS_CONFIG","spring.kafka.default.auto_commit_interval_ms"),
SPRING_KAFKA_ENABLE_AUTO_COMMIT_CONFIG("SPRING_KAFKA_ENABLE_AUTO_COMMIT_CONFIG","spring.kafka.default.enable_auth_commit_config"),
SKYWALKING_TAG_IGNORE("SKYWALKING_TAG_IGNORE","skywalking.tag.ignore")
;
private String value;
private String key;
PropertiesEnums(String value, String key) {
this.value = value;
this.key = key;
}
public String getValue() {
return value;
}
public String getKey() {
return key;
}
public static List<String> getKeys(){
PropertiesEnums[] values = PropertiesEnums.values();
List<String> keys = Lists.newArrayList();
for (PropertiesEnums kafkaEnums : values) {
keys.add(kafkaEnums.key);
}
return keys;
}
public static List<String> getValues(){
PropertiesEnums[] values = PropertiesEnums.values();
List<String> vs = Lists.newArrayList();
for (PropertiesEnums kafkaEnums : values) {
vs.add(kafkaEnums.value);
}
return vs;
}
}
=======================================================================================================================================================
spring.kafka.producer.bootstrap-servers = ${SPRING_KAFKA_PRODUCER:192.168.82.220:19092,192.168.82.220:29092,192.168.82.220:39092}
spring.kafka.consumer.bootstrap-servers = ${SPRING_KAFKA_CONSUMER:192.168.82.220:19092,192.168.82.220:29092,192.168.82.220:39092}
spring.kafka.consumer.group-id = ${SPRING_KAFKA_GROUP_ID:skywalkingReceiver}
spring.kafka.listener.missing-topics-fatal = ${SPRING_KAFKA_MISSING_FATAL:false}
spring.kafka.default.concurrency = ${SPRING_KAFKA_CONCURRENCY:15}
spring.kafka.default.partitions = ${SPRING_KAFKA_PARTITIONS:20}
spring.kafka.default.poll_records = ${SPRING_KAFKA_POLLRECORDS:10}
spring.kafka.default.auto_commit_interval_ms = ${SPRING_KAFKA_AUTO_COMMIT_INTERVAL_MS_CONFIG:1000}
spring.kafka.default.enable_auth_commit_config = ${SPRING_KAFKA_ENABLE_AUTO_COMMIT_CONFIG:true}
skywalking.tag.ignore = ${SKYWALKING_TAG_IGNORE:requestParam,responseBody,head,uri}