/**
* 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.storm.util;
import java.util.List;
import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.utils.Utils;
/**
* Observes if a call to any {@code emit(...)} or {@code emitDirect(...)} method is made.
* The internal flag {@link #emitted} must be reset by the user manually.
*/
class SpoutOutputCollectorObserver extends SpoutOutputCollector {
/** The collector to be observed. */
private final SpoutOutputCollector delegate;
/** The internal flag that it set to {@code true} if a tuple gets emitted. */
boolean emitted;
public SpoutOutputCollectorObserver(SpoutOutputCollector delegate) {
super(null);
this.delegate = delegate;
}
@Override
public List<Integer> emit(String streamId, List<Object> tuple, Object messageId) {
emitted = true;
return this.delegate.emit(streamId, tuple, messageId);
}
@Override
public List<Integer> emit(List<Object> tuple, Object messageId) {
return emit(Utils.DEFAULT_STREAM_ID, tuple, messageId);
}
@Override
public List<Integer> emit(List<Object> tuple) {
return emit(tuple, null);
}
@Override
public List<Integer> emit(String streamId, List<Object> tuple) {
return emit(streamId, tuple, null);
}
@Override
public void emitDirect(int taskId, String streamId, List<Object> tuple, Object messageId) {
emitted = true;
delegate.emitDirect(taskId, streamId, tuple, messageId);
}
@Override
public void emitDirect(int taskId, List<Object> tuple, Object messageId) {
emitDirect(taskId, Utils.DEFAULT_STREAM_ID, tuple, messageId);
}
@Override
public void emitDirect(int taskId, String streamId, List<Object> tuple) {
emitDirect(taskId, streamId, tuple, null);
}
@Override
public void emitDirect(int taskId, List<Object> tuple) {
emitDirect(taskId, tuple, null);
}
@Override
public void reportError(Throwable error) {
delegate.reportError(error);
}
}