com.cloudera.sqoop.manager.MySQLTestUtils.java Source code

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Here is the source code for com.cloudera.sqoop.manager.MySQLTestUtils.java

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/**
 * Licensed to Cloudera, Inc. under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Cloudera, Inc. 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.manager;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

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

/**
 * Utilities for mysql-based tests.
 */
public final class MySQLTestUtils {

    public static final Log LOG = LogFactory.getLog(MySQLTestUtils.class.getName());

    public static final String HOST_URL = System.getProperty("sqoop.test.mysql.connectstring.host_url",
            "jdbc:mysql://localhost/");

    public static final String MYSQL_DATABASE_NAME = "sqooptestdb";
    public static final String TABLE_NAME = "EMPLOYEES_MYSQL";
    public static final String CONNECT_STRING = HOST_URL + MYSQL_DATABASE_NAME;

    private MySQLTestUtils() {
    }

    /** @return the current username. */
    public static String getCurrentUser() {
        // First, check the $USER environment variable.
        String envUser = System.getenv("USER");
        if (null != envUser) {
            return envUser;
        }

        // Try `whoami`
        String[] whoamiArgs = new String[1];
        whoamiArgs[0] = "whoami";
        Process p = null;
        BufferedReader r = null;
        try {
            p = Runtime.getRuntime().exec(whoamiArgs);
            InputStream is = p.getInputStream();
            r = new BufferedReader(new InputStreamReader(is));
            return r.readLine();
        } catch (IOException ioe) {
            LOG.error("IOException reading from `whoami`: " + ioe.toString());
            return null;
        } finally {
            // close our stream.
            if (null != r) {
                try {
                    r.close();
                } catch (IOException ioe) {
                    LOG.warn("IOException closing input stream from `whoami`: " + ioe.toString());
                }
            }

            // wait for whoami to exit.
            while (p != null) {
                try {
                    int ret = p.waitFor();
                    if (0 != ret) {
                        LOG.error("whoami exited with error status " + ret);
                        // suppress original return value from this method.
                        return null;
                    }
                } catch (InterruptedException ie) {
                    continue; // loop around.
                }
            }
        }
    }
}