com.twitter.heron.api.topology.SpoutDeclarer Maven / Gradle / Ivy
// Copyright 2017 Twitter. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.twitter.heron.api.topology;
import java.util.Map;
import com.twitter.heron.api.generated.TopologyAPI;
import com.twitter.heron.api.spout.IRichSpout;
public class SpoutDeclarer extends BaseComponentDeclarer {
private OutputFieldsGetter output;
public SpoutDeclarer(String name, IRichSpout spout, Number taskParallelism) {
super(name, spout, taskParallelism);
output = new OutputFieldsGetter();
spout.declareOutputFields(output);
}
@Override
public SpoutDeclarer returnThis() {
return this;
}
public void dump(TopologyAPI.Topology.Builder bldr) {
TopologyAPI.Spout.Builder spoutBldr = TopologyAPI.Spout.newBuilder();
TopologyAPI.Component.Builder compBldr = TopologyAPI.Component.newBuilder();
super.dump(compBldr);
spoutBldr.setComp(compBldr);
Map outs = output.getFieldsDeclaration();
for (Map.Entry entry : outs.entrySet()) {
TopologyAPI.OutputStream.Builder obldr = TopologyAPI.OutputStream.newBuilder();
TopologyAPI.StreamId.Builder sbldr = TopologyAPI.StreamId.newBuilder();
sbldr.setId(entry.getKey());
sbldr.setComponentName(getName());
obldr.setStream(sbldr);
obldr.setSchema(entry.getValue());
spoutBldr.addOutputs(obldr);
}
bldr.addSpouts(spoutBldr);
}
}