org.pentaho.hadoop.shim.cdh4.SnappyShim.java Source code

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Here is the source code for org.pentaho.hadoop.shim.cdh4.SnappyShim.java

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/*******************************************************************************
*
* Pentaho Big Data
*
* Copyright (C) 2002-2013 by Pentaho : http://www.pentaho.com
*
*******************************************************************************
*
* 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 org.pentaho.hadoop.shim.cdh4;

import org.apache.hadoop.io.compress.SnappyCodec;
import org.pentaho.hadoop.shim.common.CommonSnappyShim;

public class SnappyShim extends CommonSnappyShim {
    /**
     * Tests whether hadoop-snappy (not to be confused with other java-based
     * snappy implementations such as jsnappy or snappy-java) plus the 
     * native snappy libraries are available.
     * 
     * @return true if hadoop-snappy is available on the classpath
     */
    public boolean isHadoopSnappyAvailable() {
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
        try {
            return SnappyCodec.isNativeCodeLoaded();
        } catch (Throwable t) {
            return false;
        } finally {
            Thread.currentThread().setContextClassLoader(cl);
        }
    }
}