| /* |
| * 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.core.fs; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.util.Preconditions; |
| |
| import java.io.IOException; |
| |
| /** |
| * This class is a {@link org.apache.flink.util.WrappingProxy} for {@link FSDataOutputStream} that is used to |
| * implement a safety net against unclosed streams. |
| * |
| * <p>See {@link SafetyNetCloseableRegistry} for more details on how this is utilized. |
| */ |
| @Internal |
| public class ClosingFSDataOutputStream |
| extends FSDataOutputStreamWrapper |
| implements WrappingProxyCloseable<FSDataOutputStream> { |
| |
| private final SafetyNetCloseableRegistry registry; |
| private final String debugString; |
| |
| private volatile boolean closed; |
| |
| public ClosingFSDataOutputStream( |
| FSDataOutputStream delegate, SafetyNetCloseableRegistry registry) throws IOException { |
| this(delegate, registry, ""); |
| } |
| |
| private ClosingFSDataOutputStream( |
| FSDataOutputStream delegate, SafetyNetCloseableRegistry registry, String debugString) throws IOException { |
| super(delegate); |
| this.registry = Preconditions.checkNotNull(registry); |
| this.debugString = Preconditions.checkNotNull(debugString); |
| this.closed = false; |
| } |
| |
| public boolean isClosed() { |
| return closed; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (!closed) { |
| closed = true; |
| registry.unregisterCloseable(this); |
| outputStream.close(); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return outputStream.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| |
| if (this == obj) { |
| return true; |
| } |
| |
| if (obj instanceof ClosingFSDataOutputStream) { |
| return outputStream.equals(((ClosingFSDataOutputStream) obj).outputStream); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "ClosingFSDataOutputStream(" + outputStream.toString() + ") : " + debugString; |
| } |
| |
| public static ClosingFSDataOutputStream wrapSafe( |
| FSDataOutputStream delegate, SafetyNetCloseableRegistry registry) throws IOException { |
| return wrapSafe(delegate, registry, ""); |
| } |
| |
| public static ClosingFSDataOutputStream wrapSafe( |
| FSDataOutputStream delegate, SafetyNetCloseableRegistry registry, String debugInfo) throws IOException { |
| |
| ClosingFSDataOutputStream inputStream = new ClosingFSDataOutputStream(delegate, registry, debugInfo); |
| registry.registerCloseable(inputStream); |
| return inputStream; |
| } |
| } |