/**
* 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.crunch.impl.mr.run;
import java.io.Serializable;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.crunch.CrunchRuntimeException;
import org.apache.crunch.DoFn;
import org.apache.crunch.Emitter;
import org.apache.crunch.impl.mr.emit.IntermediateEmitter;
import org.apache.crunch.impl.mr.emit.MultipleOutputEmitter;
import org.apache.crunch.impl.mr.emit.OutputEmitter;
import org.apache.crunch.types.Converter;
import org.apache.crunch.types.PType;
import org.apache.hadoop.conf.Configuration;
public class RTNode implements Serializable {
private static final Log LOG = LogFactory.getLog(RTNode.class);
private final String nodeName;
private DoFn<Object, Object> fn;
private PType<Object> outputPType;
private final List<RTNode> children;
private final Converter inputConverter;
private final Converter outputConverter;
private final String outputName;
private transient Emitter<Object> emitter;
public RTNode(DoFn<Object, Object> fn,
PType<Object> outputPType,
String name,
List<RTNode> children,
Converter inputConverter,
Converter outputConverter,
String outputName) {
this.fn = fn;
this.outputPType = outputPType;
this.nodeName = name;
this.children = children;
this.inputConverter = inputConverter;
this.outputConverter = outputConverter;
this.outputName = outputName;
}
public void initialize(CrunchTaskContext ctxt) {
if (emitter != null) {
// Already initialized
return;
}
fn.setContext(ctxt.getContext());
fn.initialize();
for (RTNode child : children) {
child.initialize(ctxt);
}
if (outputConverter != null) {
if (outputName != null) {
this.emitter = new MultipleOutputEmitter(outputConverter, ctxt.getMultipleOutputs(),
outputName);
} else {
this.emitter = new OutputEmitter(outputConverter, ctxt.getContext());
}
} else if (!children.isEmpty()) {
Configuration conf = ctxt.getContext().getConfiguration();
boolean disableDeepCopy = conf.getBoolean(RuntimeParameters.DISABLE_DEEP_COPY, false);
this.emitter = new IntermediateEmitter(outputPType, children, conf, disableDeepCopy || fn.disableDeepCopy());
} else {
throw new CrunchRuntimeException("Invalid RTNode config: no emitter for: " + nodeName);
}
}
public boolean isLeafNode() {
return outputConverter != null && children.isEmpty();
}
public void process(Object input) {
try {
fn.process(input, emitter);
} catch (CrunchRuntimeException e) {
if (!e.wasLogged()) {
LOG.info(String.format("Crunch exception in '%s' for input: %s", nodeName, input), e);
e.markLogged();
}
throw e;
}
}
public void process(Object key, Object value) {
process(inputConverter.convertInput(key, value));
}
public void processIterable(Object key, Iterable values) {
process(inputConverter.convertIterableInput(key, values));
}
public void cleanup() {
fn.cleanup(emitter);
emitter.flush();
for (RTNode child : children) {
child.cleanup();
}
}
@Override
public String toString() {
return "RTNode [nodeName=" + nodeName + ", fn=" + fn + ", children=" + children + ", inputConverter="
+ inputConverter + ", outputConverter=" + outputConverter + ", outputName=" + outputName + "]";
}
}