org.apache.hudi.org.apache.hadoop.hbase.util.ByteStringer 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.hadoop.hbase.util;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.protobuf.ByteString;
import com.google.protobuf.HBaseZeroCopyByteString;
/**
* Hack to workaround HBASE-10304 issue that keeps bubbling up when a mapreduce context.
*/
@InterfaceAudience.Private
public class ByteStringer {
private static final Logger LOG = LoggerFactory.getLogger(ByteStringer.class);
/**
* Flag set at class loading time.
*/
private static boolean USE_ZEROCOPYBYTESTRING = true;
// Can I classload HBaseZeroCopyByteString without IllegalAccessError?
// If we can, use it passing ByteStrings to pb else use native ByteString though more costly
// because it makes a copy of the passed in array.
static {
try {
HBaseZeroCopyByteString.wrap(new byte [0]);
} catch (IllegalAccessError iae) {
USE_ZEROCOPYBYTESTRING = false;
LOG.debug("Failed to classload HBaseZeroCopyByteString: " + iae.toString());
}
}
private ByteStringer() {
super();
}
/**
* Wraps a byte array in a {@link ByteString} without copying it.
*/
public static ByteString wrap(final byte[] array) {
return USE_ZEROCOPYBYTESTRING? HBaseZeroCopyByteString.wrap(array): ByteString.copyFrom(array);
}
/**
* Wraps a subset of a byte array in a {@link ByteString} without copying it.
*/
public static ByteString wrap(final byte[] array, int offset, int length) {
return USE_ZEROCOPYBYTESTRING? HBaseZeroCopyByteString.wrap(array, offset, length):
ByteString.copyFrom(array, offset, length);
}
}