spork-master/src/org/apache/pig/JVMReuseImpl.java
/**
 * 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.pig;

import java.lang.reflect.Method;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class JVMReuseImpl {

    private static Log LOG = LogFactory.getLog(JVMReuseImpl.class);

    public void cleanupStaticData() {
        List<Method> staticCleanupMethods = JVMReuseManager.getInstance()
                .getStaticDataCleanupMethods();
        for (Method m : staticCleanupMethods) {
            try {
                String msg = "Invoking method " + m.getName() + " in class "
                        + m.getDeclaringClass().getName() + " for static data cleanup";
                if (m.getDeclaringClass().getName().startsWith("org.apache.pig")) {
                    LOG.debug(msg);
                } else {
                    LOG.info(msg);
                }
                m.invoke(null);
            } catch (Exception e) {
                throw new RuntimeException("Error while invoking method "
                        + m.getName() + " in class " + m.getDeclaringClass().getName()
                        + " for static data cleanup", e);
            }
        }
    }
}
