FairMQ/examples/dds/ex-dds-topology.xml

<topology id="ExampleDDS">

    <property id="data1" />
    <property id="data2" />

    <declrequirement id="SamplerWorker" type="wnname" value="sampler"/>
    <declrequirement id="ProcessorWorker" type="wnname" value="processor"/>
    <declrequirement id="SinkWorker" type="wnname" value="sink"/>

    <decltask id="Sampler">
        <exe reachable="true">@EX_BIN_DIR@/fairmq-ex-dds-sampler --id sampler --color false --channel-config name=data1,type=push,method=bind -S "&lt;@DDS_PLUGIN_LIB_DIR@/" -P dds</exe>
        <requirements>
            <id>SamplerWorker</id>
        </requirements>
        <properties>
            <id access="write">data1</id>
        </properties>
    </decltask>

    <decltask id="Processor">
        <exe reachable="true">@EX_BIN_DIR@/fairmq-ex-dds-processor --id processor_%taskIndex% --config-key processor --color false --channel-config name=data1,type=pull,method=connect name=data2,type=push,method=connect -S "&lt;@DDS_PLUGIN_LIB_DIR@/" -P dds</exe>
        <requirements>
            <id>ProcessorWorker</id>
        </requirements>
        <properties>
            <id access="read">data1</id>
            <id access="read">data2</id>
        </properties>
    </decltask>

    <decltask id="Sink">
        <exe reachable="true">@EX_BIN_DIR@/fairmq-ex-dds-sink --id sink --color false --channel-config name=data2,type=pull,method=bind -S "&lt;@DDS_PLUGIN_LIB_DIR@/" -P dds</exe>
        <requirements>
            <id>SinkWorker</id>
        </requirements>
        <properties>
            <id access="write">data2</id>
        </properties>
    </decltask>

    <main id="main">
        <task>Sampler</task>
        <task>Sink</task>
        <group id="ProcessorGroup" n="10">
            <task>Processor</task>
        </group>
    </main>

</topology>