/*
* Copyright 2015-present Facebook, Inc.
*
* Licensed 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 com.facebook.buck.artifact_cache;
import com.facebook.buck.log.Logger;
import com.google.common.io.ByteStreams;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* An {@link InputStream} wrapper that fully reads the underlying stream on close. This is because
* we need to fully read an InputStream for the corresponding connection to be reused.
*/
public class FullyReadOnCloseInputStream extends FilterInputStream {
private static final Logger LOGGER = Logger.get(FullyReadOnCloseInputStream.class);
private boolean closed = false;
public FullyReadOnCloseInputStream(InputStream in) {
super(in);
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
try {
ByteStreams.copy(in, ByteStreams.nullOutputStream());
} catch (IOException e) {
LOGGER.info(e, "Exception when attempting to fully read the stream.");
}
}
super.close();
}
}