“多团队大规模”开发模式

应用SAP HANA “官方”开发模式的伙伴们在转到“多团队大规模”开发模式时会遇到各式各样的心理不适应的状况，各种纠结。比如GIT Repository和HANA Repository冲突什么的。

这些问题主要是思路没有完全转换过来，两种开发模式在不断的“打架”。做一个简单的开发模式映射这样大家或许比较容易去接受“多团队大规模”的开发模式。这个映射不一定完全正确，主要是帮助大家理解。

伙伴们想一想平常我们做JAVA或者.NET项目是怎么做的？一般情况是使用各种框架写JAVA/.NET的代码，然后用ORM映射数据库。写SQL Query时基本上都是在SQL里面去写，去测试然后拼接到自己的JAVA/.NET代码中。

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那么我们在SAP HANA平台上开发同样可以学习这样的模式，当然这种模式可能比“官方”模式厚重点，但是好处也是显而易见的，比如前文提到的那些好处。前后端的开发都可以在Eclipse中，HANA Studio的作用完全等同拼写检查SQL Query等SQL层面的工作。这样我们在开发过程中就可以应用很多手段，方便的传递参数。比如替换rootpackage，通过maven的插件就很容易的可以做到。这样HANA Instance就扮演了一个编译器的作用。前端的代码编译好之后，和后端代码整合到一起Activate到HANA Repository中，这时的Activate就像是compile一样。Maven的插件，或者Ant的脚本把Activate这些HANA特有的动作都封装起来，开发人员完全还是遵循着传统多团队大规模开发的模式——写代码，编译，调试等。

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由于Maven涉及到公司内部提供的插件，没有开源。所以就提供一个Ant的脚本以饷读者。

<project name="regi" basedir=".">
    <description>Regi wrapper</description>

     <!-- Properties for using REGI -->
    <property name="userstore.key" value="BUILD"/>
    <property name="userstore.cmdline" value="${client.dir}/hdbuserstore"/>
    <property name="regi.cmdline" value="${client.dir}/regi"/>
    <property name="regi.connection.args" value="--key=BUILD" />

    <macrodef name="regi">
        <attribute name="workspacedir" />
        <attribute name="command" />

        <sequential>
            <!-- make sure the directory exists -->
            <mkdir dir="@{workspacedir}" />

            <!-- Create the workspace -->
            <exec executable="${regi.cmdline}" dir="@{workspacedir}" failonerror="true">
              <arg line="@{command}" />
            </exec>
        </sequential>
    </macrodef>

    <macrodef name="regi_apply">
        <attribute name="workspacedir" />
        <attribute name="command" />
        <element name="files" />

        <sequential>
            <!-- make sure the directory exists -->
            <mkdir dir="@{workspacedir}" />

            <!-- Create the workspace -->
            <apply executable="${regi.cmdline}" dir="@{workspacedir}" failonerror="true" relative="true" parallel="true">
              <arg line="@{command}" />
              <files />
            </apply>
        </sequential>
    </macrodef>

    <macrodef name="regi_setupuserstore">
      <attribute name="workspacedir" />
      <sequential>
    <!-- Setup a key in the user store for use by REGI -->
    <exec executable="${userstore.cmdline}" dir="@{workspacedir}" failonerror="true">
      <arg line="SET ${userstore.key} ${hana.host} ${hana.user} ${hana.password}" />
      </exec>
    </sequential>
      </macrodef>
    
    <macrodef name="regi_createworkspace">
        <attribute name="workspacedir" />

        <sequential>
            <!-- make sure the directory exists (needed for keystore operation) -->
            <mkdir dir="@{workspacedir}" />

            <!-- Create the workspace -->
            <mkdir dir="@{workspacedir}" />
            <exec executable="${regi.cmdline}" dir="@{workspacedir}" failonerror="true">
              <arg line="${regi.connection.args} create workspace --force" />
            </exec>
        </sequential>
    </macrodef>

    <macrodef name="regi_export">
        <attribute name="workspacedir" />
        <attribute name="deliveryUnit" default="" />
        <attribute name="vendor" default="" />
        <attribute name="fileName" default="" />

        <sequential>        
            <!-- Export the desired delivery unit to the specified file -->
            <regi workspacedir="@{workspacedir}" command="export @{deliveryUnit} @{vendor} @{fileName}" />
        </sequential>
    </macrodef>

    <macrodef name="regi_track">
        <attribute name="workspacedir" />
        <attribute name="package" default="" />

        <sequential>
            <echo>regi track @{package}</echo>

            <!-- Track the desired package -->
            <regi workspacedir="@{workspacedir}" command="track @{package}" />
        </sequential>
    </macrodef>

    <macrodef name="regi_commit">
        <attribute name="workspacedir" />

        <sequential>
            <regi workspacedir="@{workspacedir}" command="commit" />
            <regi workspacedir="@{workspacedir}" command="activate" />
        </sequential>
    </macrodef>

    <macrodef name="regi_import">
        <attribute name="workspacedir" />
        <attribute name="import" />

        <sequential>
            <regi workspacedir="@{workspacedir}" command="import @{import}" />
        </sequential>
    </macrodef>

    <macrodef name="regi_cleanpackage">
        <attribute name="package"/>

        <sequential>
            <echo message="Deleting regi package: @{package}" />

            <!-- Brutally crush any and all evidence of the repo objects for the passed package -->
            <hdbsqlsql failonerror="false" sql="
                delete from &quot;_SYS_REPO&quot;.&quot;ACTIVE_OBJECT&quot;   where PACKAGE_ID = '@{package}' OR PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;OBJECT_HISTORY&quot;  where PACKAGE_ID = '@{package}' OR PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;RUNTIME_OBJECTS&quot; where PACKAGE_ID = '@{package}' OR PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;PACKAGE_CATALOG&quot; where PACKAGE_ID = '@{package}' OR PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;INACTIVE_OBJECT&quot; where PACKAGE_ID = '@{package}' OR PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;ACTIVE_OBJECTCROSSREF&quot; where FROM_PACKAGE_ID = '@{package}' OR FROM_PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;ACTIVE_OBJECTCROSSREF&quot; where TO_PACKAGE_ID = '@{package}' OR TO_PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;INACTIVE_OBJECTCROSSREF&quot; where FROM_PACKAGE_ID = '@{package}' OR FROM_PACKAGE_ID LIKE '@{package}.%' ${line.separator}
                delete from &quot;_SYS_REPO&quot;.&quot;INACTIVE_OBJECTCROSSREF&quot; where TO_PACKAGE_ID = '@{package}' OR TO_PACKAGE_ID LIKE '@{package}.%' ${line.separator}
            "/>
        </sequential>
    </macrodef>

    <macrodef name="regi_clean">
        <attribute name="workspacedir" />

        <sequential>
            <delete dir="@{workspacedir}/._SYS_REGI_settings"/>
        </sequential>
    </macrodef>
    
    <macrodef name="regi_checkout_trackedPackages">
        <attribute name="workspacedir" />

        <sequential>
            <echo>regi checkout trackedPackages --force</echo>
            <echo>workspacedir=@{workspacedir}</echo>

            <!-- Checkout all packages that have been tracked. -->
            <regi workspacedir="@{workspacedir}" command="checkout trackedPackages --force" />
        </sequential>
    </macrodef>

    <macrodef name="regi_delete_packages">
        <attribute name="workspacedir" />
        <attribute name="packages" />

        <sequential>
            <echo>regi delete packages @{packages}</echo>
            <echo>workspacedir=@{workspacedir}</echo>

            <!-- Delete the desired package -->
            <regi workspacedir="@{workspacedir}" command="delete packages @{packages}" />
        </sequential>
    </macrodef>

</project>