/*
* 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.streaming.api.functions;
import org.apache.flink.streaming.api.functions.source.SourceFunction;
import org.apache.flink.streaming.api.watermark.Watermark;
import java.util.List;
/**
* Mock context that collects elements in a List.
*
* @param <T> Type of the collected elements.
*/
public class ListSourceContext<T> implements SourceFunction.SourceContext<T> {
private final Object lock = new Object();
private final List<T> target;
private final long delay;
public ListSourceContext(List<T> target) {
this(target, 0L);
}
public ListSourceContext(List<T> target, long delay) {
this.target = target;
this.delay = delay;
}
@Override
public void collect(T element) {
target.add(element);
if (delay > 0) {
try {
Thread.sleep(delay);
}
catch (InterruptedException e) {
// ignore
}
}
}
@Override
public void collectWithTimestamp(T element, long timestamp) {
target.add(element);
}
@Override
public void emitWatermark(Watermark mark) {
throw new UnsupportedOperationException();
}
@Override
public void markAsTemporarilyIdle() {
throw new UnsupportedOperationException();
}
@Override
public Object getCheckpointLock() {
return lock;
}
@Override
public void close() {
}
}