| /* |
| * 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.api.common.io; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.core.io.InputSplit; |
| import org.apache.flink.core.io.InputSplitAssigner; |
| import org.apache.flink.util.FlinkRuntimeException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * This is the default implementation of the {@link InputSplitAssigner} interface. The default input split assigner |
| * simply returns all input splits of an input vertex in the order they were originally computed. |
| */ |
| @Internal |
| public class DefaultInputSplitAssigner implements InputSplitAssigner { |
| |
| /** The logging object used to report information and errors. */ |
| private static final Logger LOG = LoggerFactory.getLogger(DefaultInputSplitAssigner.class); |
| |
| /** The list of all splits. */ |
| private final List<InputSplit> splits = new ArrayList<InputSplit>(); |
| |
| public DefaultInputSplitAssigner(InputSplit[] splits) { |
| Collections.addAll(this.splits, splits); |
| } |
| |
| public DefaultInputSplitAssigner(Collection<? extends InputSplit> splits) { |
| this.splits.addAll(splits); |
| } |
| |
| @Override |
| public InputSplit getNextInputSplit(String host, int taskId) { |
| InputSplit next = null; |
| |
| // keep the synchronized part short |
| synchronized (this.splits) { |
| if (this.splits.size() > 0) { |
| next = this.splits.remove(this.splits.size() - 1); |
| } |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| if (next == null) { |
| LOG.debug("No more input splits available"); |
| } else { |
| LOG.debug("Assigning split " + next + " to " + host); |
| } |
| } |
| return next; |
| } |
| |
| @Override |
| public void inputSplitsAssigned(int taskId, List<InputSplit> inputSplits) { |
| for (InputSplit inputSplit : inputSplits) { |
| boolean found = false; |
| for (InputSplit split : splits) { |
| if (split.equals(inputSplit)) { |
| splits.remove(split); |
| found = true; |
| break; |
| } |
| } |
| if (!found) { |
| throw new FlinkRuntimeException("InputSplit not found for " + inputSplit.getSplitNumber()); |
| } |
| } |
| } |
| } |