org.apache.flink.runtime.jobgraph.InputOutputFormatVertex Maven / Gradle / Ivy
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* 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,
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*/
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.InputFormat;
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;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* A task vertex that runs an initialization and a finalization on the master. If necessary, it tries
* to deserialize input and output formats, and initialize and finalize them on master.
*/
public class InputOutputFormatVertex extends JobVertex {
private static final long serialVersionUID = 1L;
private final Map formatDescriptions = new HashMap<>();
public InputOutputFormatVertex(String name) {
super(name);
}
public InputOutputFormatVertex(
String name,
JobVertexID id,
List alternativeIds,
List operatorIds,
List alternativeOperatorIds) {
super(name, id, alternativeIds, operatorIds, alternativeOperatorIds);
}
@Override
public void initializeOnMaster(ClassLoader loader) throws Exception {
final InputOutputFormatContainer formatContainer = initInputOutputformatContainer(loader);
final ClassLoader original = Thread.currentThread().getContextClassLoader();
try {
// set user classloader before calling user code
Thread.currentThread().setContextClassLoader(loader);
// configure the input format and setup input splits
Map>> inputFormats = formatContainer.getInputFormats();
if (inputFormats.size() > 1) {
throw new UnsupportedOperationException("Multiple input formats are not supported in a job vertex.");
}
for (Map.Entry>> entry : inputFormats.entrySet()) {
final InputFormat inputFormat;
try {
inputFormat = entry.getValue().getUserCodeObject();
inputFormat.configure(formatContainer.getParameters(entry.getKey()));
} catch (Throwable t) {
throw new Exception("Configuring the input format (" + getFormatDescription(entry.getKey()) + ") failed: "
+ t.getMessage(), t);
}
setInputSplitSource(inputFormat);
}
// configure input formats and invoke initializeGlobal()
Map>> outputFormats = formatContainer.getOutputFormats();
for (Map.Entry>> entry : outputFormats.entrySet()) {
final OutputFormat outputFormat;
try {
outputFormat = entry.getValue().getUserCodeObject();
outputFormat.configure(formatContainer.getParameters(entry.getKey()));
} catch (Throwable t) {
throw new Exception("Configuring the output format (" + getFormatDescription(entry.getKey()) + ") failed: "
+ t.getMessage(), t);
}
if (outputFormat instanceof InitializeOnMaster) {
((InitializeOnMaster) outputFormat).initializeGlobal(getParallelism());
}
}
} finally {
// restore original classloader
Thread.currentThread().setContextClassLoader(original);
}
}
@Override
public void finalizeOnMaster(ClassLoader loader) throws Exception {
final InputOutputFormatContainer formatContainer = initInputOutputformatContainer(loader);
final ClassLoader original = Thread.currentThread().getContextClassLoader();
try {
// set user classloader before calling user code
Thread.currentThread().setContextClassLoader(loader);
// configure input formats and invoke finalizeGlobal()
Map>> outputFormats = formatContainer.getOutputFormats();
for (Map.Entry>> entry : outputFormats.entrySet()) {
final OutputFormat outputFormat;
try {
outputFormat = entry.getValue().getUserCodeObject();
outputFormat.configure(formatContainer.getParameters(entry.getKey()));
} catch (Throwable t) {
throw new Exception("Configuring the output format (" + getFormatDescription(entry.getKey()) + ") failed: "
+ t.getMessage(), t);
}
if (outputFormat instanceof FinalizeOnMaster) {
((FinalizeOnMaster) outputFormat).finalizeGlobal(getParallelism());
}
}
} finally {
// restore original classloader
Thread.currentThread().setContextClassLoader(original);
}
}
public String getFormatDescription(OperatorID operatorID) {
return formatDescriptions.get(operatorID);
}
public void setFormatDescription(OperatorID operatorID, String formatDescription) {
formatDescriptions.put(checkNotNull(operatorID), formatDescription);
}
private InputOutputFormatContainer initInputOutputformatContainer(ClassLoader classLoader) throws Exception {
try {
return new InputOutputFormatContainer(new TaskConfig(getConfiguration()), classLoader);
} catch (Throwable t) {
throw new Exception("Loading the input/output formats failed: "
+ String.join(",", formatDescriptions.values()), t);
}
}
}