com.cloudera.sqoop.lib.TestLargeObjectLoader.java Source code

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Here is the source code for com.cloudera.sqoop.lib.TestLargeObjectLoader.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 com.cloudera.sqoop.lib;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.cloudera.sqoop.testutil.BaseSqoopTestCase;
import com.cloudera.sqoop.testutil.CommonArgs;
import junit.framework.TestCase;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

import com.cloudera.sqoop.testutil.MockResultSet;

/**
 * Test deserialization of ClobRef and BlobRef fields.
 */
public class TestLargeObjectLoader extends TestCase {

    protected Configuration conf;
    protected LargeObjectLoader loader;
    protected Path outDir;

    public void setUp() throws IOException, InterruptedException {
        conf = new Configuration();
        if (!BaseSqoopTestCase.isOnPhysicalCluster()) {
            conf.set(CommonArgs.FS_DEFAULT_NAME, CommonArgs.LOCAL_FS);
        }
        String tmpDir = System.getProperty("test.build.data", "/tmp/");
        this.outDir = new Path(new Path(tmpDir), "testLobLoader");
        FileSystem fs = FileSystem.get(conf);
        if (fs.exists(outDir)) {
            fs.delete(outDir, true);
        }
        fs.mkdirs(outDir);

        loader = new LargeObjectLoader(conf, outDir);
    }

    public void testReadClobRef() throws IOException, InterruptedException, SQLException {
        // This should give us an inline CLOB.
        ResultSet resultSet = new MockResultSet();
        ClobRef clob = loader.readClobRef(0, resultSet);
        assertNotNull(clob);
        assertFalse(clob.isExternal());
        assertEquals(MockResultSet.CLOB_DATA, clob.toString());

        // LOBs bigger than 4 bytes are now external.
        conf.setLong(LargeObjectLoader.MAX_INLINE_LOB_LEN_KEY, 4);
        clob = loader.readClobRef(0, resultSet);
        assertNotNull(clob);
        assertTrue(clob.isExternal());
        loader.close();
        Reader r = clob.getDataStream(conf, outDir);
        char[] buf = new char[4096];
        int chars = r.read(buf, 0, 4096);
        r.close();
        String str = new String(buf, 0, chars);
        assertEquals(MockResultSet.CLOB_DATA, str);
    }

    public void testReadBlobRef() throws IOException, InterruptedException, SQLException {
        // This should give us an inline BLOB.
        ResultSet resultSet = new MockResultSet();
        BlobRef blob = loader.readBlobRef(0, resultSet);
        assertNotNull(blob);
        assertFalse(blob.isExternal());
        byte[] data = blob.getData();
        byte[] blobData = MockResultSet.blobData();
        assertEquals(blobData.length, data.length);
        for (int i = 0; i < data.length; i++) {
            assertEquals(blobData[i], data[i]);
        }

        // LOBs bigger than 4 bytes are now external.
        conf.setLong(LargeObjectLoader.MAX_INLINE_LOB_LEN_KEY, 4);
        blob = loader.readBlobRef(0, resultSet);
        assertNotNull(blob);
        assertTrue(blob.isExternal());
        loader.close();
        InputStream is = blob.getDataStream(conf, outDir);
        byte[] buf = new byte[4096];
        int bytes = is.read(buf, 0, 4096);
        is.close();

        assertEquals(blobData.length, bytes);
        for (int i = 0; i < bytes; i++) {
            assertEquals(blobData[i], buf[i]);
        }
    }
}