org.apache.blur.hive.BlurHiveMRLoaderOutputCommitter.java Source code

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Here is the source code for org.apache.blur.hive.BlurHiveMRLoaderOutputCommitter.java

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/**
 * 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.blur.hive;

import java.io.IOException;
import java.security.PrivilegedExceptionAction;

import org.apache.blur.mapreduce.lib.BlurOutputFormat;
import org.apache.blur.mapreduce.lib.update.BulkTableUpdateCommand;
import org.apache.blur.thrift.BlurClient;
import org.apache.blur.thrift.generated.TableDescriptor;
import org.apache.blur.utils.BlurConstants;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobContext;
import org.apache.hadoop.mapred.OutputCommitter;
import org.apache.hadoop.mapred.TaskAttemptContext;
import org.apache.hadoop.security.UserGroupInformation;

public class BlurHiveMRLoaderOutputCommitter extends OutputCommitter {

    public static final String YARN_SITE_XML = "yarn-site.xml";
    public static final String MAPRED_SITE_XML = "mapred-site.xml";
    public static final String HDFS_SITE_XML = "hdfs-site.xml";

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

    @Override
    public void setupJob(JobContext jobContext) throws IOException {
    }

    @Override
    public void setupTask(TaskAttemptContext taskContext) throws IOException {
    }

    @Override
    public boolean needsTaskCommit(TaskAttemptContext taskContext) throws IOException {
        return false;
    }

    @Override
    public void commitTask(TaskAttemptContext taskContext) throws IOException {
    }

    @Override
    public void abortTask(TaskAttemptContext taskContext) throws IOException {

    }

    @Override
    public void abortJob(JobContext context, int status) throws IOException {
        finishBulkJob(context, false);
    }

    @Override
    public void cleanupJob(JobContext context) throws IOException {

    }

    @Override
    public void commitJob(JobContext context) throws IOException {
        finishBulkJob(context, true);
    }

    private void finishBulkJob(JobContext context, final boolean apply) throws IOException {
        final Configuration configuration = context.getConfiguration();
        PrivilegedExceptionAction<Void> action = new PrivilegedExceptionAction<Void>() {
            @Override
            public Void run() throws Exception {
                String workingPathStr = configuration.get(BlurConstants.BLUR_BULK_UPDATE_WORKING_PATH);
                Path workingPath = new Path(workingPathStr);
                Path tmpDir = new Path(workingPath, "tmp");
                FileSystem fileSystem = tmpDir.getFileSystem(configuration);
                String loadId = configuration.get(BlurSerDe.BLUR_MR_LOAD_ID);
                Path loadPath = new Path(tmpDir, loadId);

                if (apply) {
                    Path newDataPath = new Path(workingPath, "new");
                    Path dst = new Path(newDataPath, loadId);
                    if (!fileSystem.rename(loadPath, dst)) {
                        LOG.error("Could not move data from src [" + loadPath + "] to dst [" + dst + "]");
                        throw new IOException(
                                "Could not move data from src [" + loadPath + "] to dst [" + dst + "]");
                    }

                    TableDescriptor tableDescriptor = BlurOutputFormat.getTableDescriptor(configuration);
                    String connectionStr = configuration.get(BlurSerDe.BLUR_CONTROLLER_CONNECTION_STR);
                    BulkTableUpdateCommand bulkTableUpdateCommand = new BulkTableUpdateCommand();
                    bulkTableUpdateCommand.setAutoLoad(true);
                    bulkTableUpdateCommand.setTable(tableDescriptor.getName());
                    bulkTableUpdateCommand.setWaitForDataBeVisible(true);

                    Configuration config = new Configuration(false);
                    config.addResource(HDFS_SITE_XML);
                    config.addResource(YARN_SITE_XML);
                    config.addResource(MAPRED_SITE_XML);

                    bulkTableUpdateCommand.addExtraConfig(config);
                    if (bulkTableUpdateCommand.run(BlurClient.getClient(connectionStr)) != 0) {
                        throw new IOException("Unknown error occured duing load.");
                    }
                } else {
                    fileSystem.delete(loadPath, true);
                }
                return null;
            }
        };
        UserGroupInformation userGroupInformation = BlurHiveOutputFormat.getUGI(configuration);
        try {
            userGroupInformation.doAs(action);
        } catch (InterruptedException e) {
            throw new IOException(e);
        }
    }

}