com.twitter.heron.streamlet.Runner 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.
package com.twitter.heron.streamlet;
import com.twitter.heron.api.HeronSubmitter;
import com.twitter.heron.api.exception.AlreadyAliveException;
import com.twitter.heron.api.exception.InvalidTopologyException;
import com.twitter.heron.api.topology.TopologyBuilder;
import com.twitter.heron.streamlet.impl.BuilderImpl;
/**
* Runner is used to run a topology that is built by the builder.
* It exports a sole function called run that takes care of constructing the topology
*/
public final class Runner {
public Runner() { }
/**
* Runs the computation
* @param name The name of the topology
* @param config Any config that is passed to the topology
* @param builder The builder used to keep track of the sources.
*/
public void run(String name, Config config, Builder builder) {
BuilderImpl bldr = (BuilderImpl) builder;
TopologyBuilder topologyBuilder = bldr.build();
try {
HeronSubmitter.submitTopology(name, config.getHeronConfig(),
topologyBuilder.createTopology());
} catch (AlreadyAliveException | InvalidTopologyException e) {
e.printStackTrace();
}
}
}