org.apache.flink.runtime.blob.VoidBlobWriter Maven / Gradle / Ivy
/*
* 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.runtime.blob;
import org.apache.flink.annotation.VisibleForTesting;
import org.apache.flink.api.common.JobID;
import java.io.IOException;
import java.io.InputStream;
/**
* BlobWriter which does not support writing BLOBs to a store. This class is
* mainly used for testing purposes where we don't want to store data in the
* BLOB store.
*/
@VisibleForTesting
public class VoidBlobWriter implements BlobWriter {
private static final VoidBlobWriter INSTANCE = new VoidBlobWriter();
@Override
public PermanentBlobKey putPermanent(JobID jobId, byte[] value) throws IOException {
throw new IOException("The VoidBlobWriter cannot write data to the BLOB store.");
}
@Override
public PermanentBlobKey putPermanent(JobID jobId, InputStream inputStream) throws IOException {
throw new IOException("The VoidBlobWriter cannot write data to the BLOB store.");
}
@Override
public int getMinOffloadingSize() {
return Integer.MAX_VALUE;
}
public static VoidBlobWriter getInstance() {
return INSTANCE;
}
}