org.apache.flink.runtime.jobgraph.OutputFormatVertex Maven / Gradle / Ivy
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* 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 org.apache.flink.runtime.jobgraph;
import org.apache.flink.api.common.io.FinalizeOnMaster;
import org.apache.flink.api.common.io.InitializeOnMaster;
import org.apache.flink.api.common.io.OutputFormat;
import org.apache.flink.api.common.operators.util.UserCodeWrapper;
import org.apache.flink.runtime.operators.util.TaskConfig;
/**
* A task vertex that run an initialization on the master, trying to deserialize an output format
* and initializing it on master, if necessary.
*/
public class OutputFormatVertex extends JobVertex {
private static final long serialVersionUID = 1L;
private String formatDescription;
/**
* Creates a new task vertex with the specified name.
*
* @param name The name of the task vertex.
*/
public OutputFormatVertex(String name) {
super(name);
}
public void setFormatDescription(String formatDescription) {
this.formatDescription = formatDescription;
}
public String getFormatDescription() {
return formatDescription;
}
@Override
public void initializeOnMaster(ClassLoader loader) throws Exception {
final TaskConfig cfg = new TaskConfig(getConfiguration());
UserCodeWrapper> wrapper;
try {
wrapper = cfg.>getStubWrapper(loader);
}
catch (Throwable t) {
throw new Exception("Deserializing the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
if (wrapper == null) {
throw new Exception("No input format present in InputFormatVertex's task configuration.");
}
OutputFormat outputFormat;
try {
outputFormat = wrapper.getUserCodeObject(OutputFormat.class, loader);
}
catch (Throwable t) {
throw new Exception("Instantiating the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
try {
outputFormat.configure(cfg.getStubParameters());
}
catch (Throwable t) {
throw new Exception("Configuring the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
if (outputFormat instanceof InitializeOnMaster) {
((InitializeOnMaster) outputFormat).initializeGlobal(getParallelism());
}
}
@Override
public void finalizeOnMaster(ClassLoader loader) throws Exception {
final TaskConfig cfg = new TaskConfig(getConfiguration());
UserCodeWrapper> wrapper;
try {
wrapper = cfg.>getStubWrapper(loader);
}
catch (Throwable t) {
throw new Exception("Deserializing the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
if (wrapper == null) {
throw new Exception("No input format present in InputFormatVertex's task configuration.");
}
OutputFormat outputFormat;
try {
outputFormat = wrapper.getUserCodeObject(OutputFormat.class, loader);
}
catch (Throwable t) {
throw new Exception("Instantiating the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
try {
outputFormat.configure(cfg.getStubParameters());
}
catch (Throwable t) {
throw new Exception("Configuring the OutputFormat (" + formatDescription + ") failed: " + t.getMessage(), t);
}
if (outputFormat instanceof FinalizeOnMaster) {
((FinalizeOnMaster) outputFormat).finalizeGlobal(getParallelism());
}
}
}