| /* |
| * 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.carbon.flink; |
| |
| import java.io.IOException; |
| |
| import org.apache.flink.core.fs.RecoverableFsDataOutputStream; |
| import org.apache.flink.core.fs.RecoverableWriter; |
| |
| public final class ProxyRecoverableOutputStream extends RecoverableFsDataOutputStream { |
| |
| ProxyRecoverableOutputStream() { |
| // protected constructor. |
| } |
| |
| private ProxyFileWriter<?> writer; |
| |
| public void bind(final ProxyFileWriter<?> writer) { |
| if (writer == null) { |
| throw new IllegalArgumentException("Argument [writer] is null."); |
| } |
| if (this.writer != null) { |
| throw new IllegalStateException("The writer was bound."); |
| } |
| this.writer = writer; |
| } |
| |
| @Override |
| public long getPos() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public RecoverableWriter.ResumeRecoverable persist() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void write(final int aByte) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void flush() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void sync() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void close() { |
| // TODO streaming结束的时候和出异常的时候都会调用该方法 |
| if (this.writer != null) { |
| this.writer.close(); |
| } |
| } |
| |
| @Override |
| public Committer closeForCommit() { |
| if (this.writer == null) { |
| throw new IllegalStateException("The writer was not bound."); |
| } |
| return new Committer( |
| new ProxyRecoverable( |
| this.writer.getFactory().getType(), |
| this.writer.getFactory().getConfiguration(), |
| this.writer.getIdentifier(), |
| this.writer.getPath() |
| ) |
| ); |
| } |
| |
| static final class Committer implements RecoverableFsDataOutputStream.Committer { |
| |
| Committer(final ProxyRecoverable recoverable) { |
| this.recoverable = recoverable; |
| } |
| |
| private final ProxyRecoverable recoverable; |
| |
| @Override |
| public void commit() throws IOException { |
| this.newWriter().commit(); |
| } |
| |
| @Override |
| public void commitAfterRecovery() { |
| // to do nothing. |
| } |
| |
| @Override |
| public RecoverableWriter.CommitRecoverable getRecoverable() { |
| return this.recoverable; |
| } |
| |
| private ProxyFileWriter<?> newWriter() throws IOException { |
| final ProxyFileWriterFactory writerFactory = |
| ProxyFileWriterFactory.newInstance(this.recoverable.getWriterType()); |
| if (writerFactory == null) { |
| // TODO |
| throw new UnsupportedOperationException(); |
| } |
| writerFactory.setConfiguration(this.recoverable.getWriterConfiguration()); |
| return writerFactory.create(this.recoverable.getWriterIdentifier(), |
| this.recoverable.getWritePath()); |
| } |
| |
| } |
| |
| } |