Java tutorial
/** * 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.manager; import com.cloudera.sqoop.SqoopOptions; import com.cloudera.sqoop.testutil.CommonArgs; import com.cloudera.sqoop.testutil.ExportJobTestCase; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.Before; import java.io.BufferedWriter; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.Writer; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; /** * */ public class PostgresqlExportTest extends ExportJobTestCase { public static final Log LOG = LogFactory.getLog(PostgresqlExportTest.class.getName()); static final String HOST_URL = System.getProperty("sqoop.test.postgresql.connectstring.host_url", "jdbc:postgresql://localhost/"); static final String DATABASE_USER = System.getProperty("sqoop.test.postgresql.connectstring.username", "sqooptest"); static final String DATABASE_NAME = System.getProperty("sqoop.test.postgresql.connectstring.database", "sqooptest"); static final String PASSWORD = System.getProperty("sqoop.test.postgresql.connectstring.password"); static final String TABLE_NAME = "EMPLOYEES_PG"; static final String PROCEDURE_NAME = "INSERT_AN_EMPLOYEE"; static final String STAGING_TABLE_NAME = "STAGING"; static final String SCHEMA_PUBLIC = "public"; static final String SCHEMA_SPECIAL = "special"; static final String CONNECT_STRING = HOST_URL + DATABASE_NAME; protected Connection connection; @Override protected boolean useHsqldbTestServer() { return false; } @Before public void setUp() { super.setUp(); LOG.debug("Setting up postgresql test: " + CONNECT_STRING); try { connection = DriverManager.getConnection(CONNECT_STRING, DATABASE_USER, PASSWORD); connection.setAutoCommit(false); } catch (SQLException ex) { LOG.error("Can't create connection", ex); throw new RuntimeException(ex); } createTable(TABLE_NAME, SCHEMA_PUBLIC); createTable(STAGING_TABLE_NAME, SCHEMA_PUBLIC); createTable(TABLE_NAME, SCHEMA_SPECIAL); createTable(STAGING_TABLE_NAME, SCHEMA_SPECIAL); createProcedure(PROCEDURE_NAME, SCHEMA_PUBLIC); LOG.debug("setUp complete."); } @Override public void tearDown() { super.tearDown(); try { connection.close(); } catch (SQLException e) { LOG.error("Ignoring exception in tearDown", e); } } private interface CreateIt { void createIt(Statement st, String fullName, ConnManager manager) throws SQLException; } private void createTable(String tableName, String schema) { CreateIt createIt = new CreateIt() { @Override public void createIt(Statement st, String fullName, ConnManager manager) throws SQLException { st.executeUpdate("CREATE TABLE " + fullName + " (" + manager.escapeColName("id") + " INT NOT NULL PRIMARY KEY, " + manager.escapeColName("name") + " VARCHAR(24) NOT NULL, " + manager.escapeColName("start_date") + " DATE, " + manager.escapeColName("salary") + " FLOAT, " + manager.escapeColName("dept") + " VARCHAR(32))"); } }; create(tableName, "TABLE", schema, createIt); } private void createProcedure(String procedureName, String schema) { CreateIt createIt = new CreateIt() { @Override public void createIt(Statement st, String fullName, ConnManager manager) throws SQLException { st.executeUpdate("CREATE OR REPLACE FUNCTION " + fullName + " (" + "IN " + manager.escapeColName("id") + " INT," + "IN " + manager.escapeColName("name") + " VARCHAR(24)," + "IN " + manager.escapeColName("start_date") + " DATE," + "IN " + manager.escapeColName("salary") + " FLOAT," + "IN " + manager.escapeColName("dept") + " VARCHAR(32)" + ") " + "RETURNS VOID " + "AS $$ " + "BEGIN " + "INSERT INTO " + escapeTableOrSchemaName(SCHEMA_PUBLIC) + "." + escapeTableOrSchemaName(TABLE_NAME) + " (" + manager.escapeColName("id") + ", " + manager.escapeColName("name") + ", " + manager.escapeColName("start_date") + ", " + manager.escapeColName("salary") + ", " + manager.escapeColName("dept") + ") VALUES (" + manager.escapeColName("id") + ", " + manager.escapeColName("name") + ", " + manager.escapeColName("start_date") + ", " + manager.escapeColName("salary") + ", " + manager.escapeColName("dept") + ");" + "END;" + "$$ LANGUAGE plpgsql;"); } }; create(procedureName, "FUNCTION", schema, createIt); } private void create(String name, String type, String schema, CreateIt createIt) { SqoopOptions options = new SqoopOptions(CONNECT_STRING, name); options.setUsername(DATABASE_USER); ConnManager manager = null; Statement st = null; try { manager = new PostgresqlManager(options); st = connection.createStatement(); // Create schema if not exists in dummy way (always create and ignore // errors. try { st.executeUpdate("CREATE SCHEMA " + escapeTableOrSchemaName(schema)); connection.commit(); } catch (SQLException e) { LOG.info("Couldn't create schema " + schema + " (is o.k. as long as" + "the schema already exists.", e); connection.rollback(); } String fullTableName = escapeTableOrSchemaName(schema) + "." + escapeTableOrSchemaName(name); try { // Try to remove the table first. DROP TABLE IF EXISTS didn't // get added until pg 8.3, so we just use "DROP TABLE" and ignore // any exception here if one occurs. st.executeUpdate("DROP " + type + " " + fullTableName); } catch (SQLException e) { LOG.info("Couldn't drop " + type.toLowerCase() + " " + fullTableName + " (ok)", e); // Now we need to reset the transaction. connection.rollback(); } createIt.createIt(st, fullTableName, manager); connection.commit(); } catch (SQLException sqlE) { LOG.error("Encountered SQL Exception: " + sqlE); sqlE.printStackTrace(); fail("SQLException when running test setUp(): " + sqlE); } finally { try { if (null != st) { st.close(); } if (null != manager) { manager.close(); } } catch (SQLException sqlE) { LOG.warn("Got SQLException when closing connection: " + sqlE); } } LOG.debug("setUp complete."); } private String[] getArgv(boolean useTable, String... extraArgs) { ArrayList<String> args = new ArrayList<String>(); CommonArgs.addHadoopFlags(args); if (useTable) { args.add("--table"); args.add(TABLE_NAME); } else { args.add("--call"); args.add(PROCEDURE_NAME); } args.add("--export-dir"); args.add(getWarehouseDir()); args.add("--fields-terminated-by"); args.add(","); args.add("--lines-terminated-by"); args.add("\\n"); args.add("--connect"); args.add(CONNECT_STRING); args.add("--username"); args.add(DATABASE_USER); args.add("-m"); args.add("1"); for (String arg : extraArgs) { args.add(arg); } return args.toArray(new String[0]); } protected void createTestFile(String filename, String[] lines) throws IOException { new File(getWarehouseDir()).mkdirs(); File file = new File(getWarehouseDir() + "/" + filename); Writer output = new BufferedWriter(new FileWriter(file)); for (String line : lines) { output.write(line); output.write("\n"); } output.close(); } public void testExport() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); runExport(getArgv(true)); assertRowCount(2, escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportUsingProcedure() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); runExport(getArgv(false)); assertRowCount(2, escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportStaging() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--staging-table", STAGING_TABLE_NAME, }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportDirect() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--direct" }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportCustomSchema() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--", "--schema", SCHEMA_SPECIAL, }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(SCHEMA_SPECIAL) + "." + escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportCustomSchemaStaging() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--staging-table", STAGING_TABLE_NAME, "--", "--schema", SCHEMA_SPECIAL, }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(SCHEMA_SPECIAL) + "." + escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportCustomSchemaStagingClear() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--staging-table", STAGING_TABLE_NAME, "--clear-staging-table", "--", "--schema", SCHEMA_SPECIAL, }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(SCHEMA_SPECIAL) + "." + escapeTableOrSchemaName(TABLE_NAME), connection); } public void testExportCustomSchemaDirect() throws IOException, SQLException { createTestFile("inputFile", new String[] { "2,Bob,2009-04-20,400,sales", "3,Fred,2009-01-23,15,marketing", }); String[] extra = new String[] { "--direct", "--", "--schema", SCHEMA_SPECIAL, }; runExport(getArgv(true, extra)); assertRowCount(2, escapeTableOrSchemaName(SCHEMA_SPECIAL) + "." + escapeTableOrSchemaName(TABLE_NAME), connection); } public static void assertRowCount(long expected, String tableName, Connection connection) { Statement stmt = null; ResultSet rs = null; try { stmt = connection.createStatement(); rs = stmt.executeQuery("SELECT count(*) FROM " + tableName); rs.next(); assertEquals(expected, rs.getLong(1)); } catch (SQLException e) { LOG.error("Can't verify number of rows", e); fail(); } finally { try { connection.commit(); if (stmt != null) { stmt.close(); } if (rs != null) { rs.close(); } } catch (SQLException ex) { LOG.info("Ignored exception in finally block."); } } } public String escapeTableOrSchemaName(String tableName) { return "\"" + tableName + "\""; } }