co.cask.tephra.persist.HDFSTransactionStateStorageTest.java Source code

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Here is the source code for co.cask.tephra.persist.HDFSTransactionStateStorageTest.java

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/*
 * Copyright  2012-2014 Cask Data, 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 co.cask.tephra.persist;

import co.cask.tephra.TxConstants;
import co.cask.tephra.metrics.TxMetricsCollector;
import co.cask.tephra.snapshot.SnapshotCodecProvider;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.rules.TemporaryFolder;

import java.io.IOException;

/**
 * Tests persistence of transaction snapshots and write-ahead logs to HDFS storage, using the
 * {@link HDFSTransactionStateStorage} and {@link HDFSTransactionLog} implementations.
 */
public class HDFSTransactionStateStorageTest extends AbstractTransactionStateStorageTest {

    @ClassRule
    public static TemporaryFolder tmpFolder = new TemporaryFolder();

    private static MiniDFSCluster dfsCluster;
    private static Configuration conf;

    @BeforeClass
    public static void setupBeforeClass() throws Exception {
        Configuration hConf = new Configuration();
        hConf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, tmpFolder.newFolder().getAbsolutePath());

        dfsCluster = new MiniDFSCluster.Builder(hConf).numDataNodes(1).build();
        conf = new Configuration(dfsCluster.getFileSystem().getConf());
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
        dfsCluster.shutdown();
    }

    @Override
    protected Configuration getConfiguration(String testName) throws IOException {
        // tests should use the current user for HDFS
        conf.unset(TxConstants.Manager.CFG_TX_HDFS_USER);
        conf.set(TxConstants.Manager.CFG_TX_SNAPSHOT_DIR, tmpFolder.newFolder().getAbsolutePath());
        return conf;
    }

    @Override
    protected AbstractTransactionStateStorage getStorage(Configuration conf) {
        return new HDFSTransactionStateStorage(conf, new SnapshotCodecProvider(conf), new TxMetricsCollector());
    }
}