--- /dev/null
+/*
+ * Copyright 2005 the original author or authors.
+ *
+ * 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 org.wamblee.support.persistence;
+
+import java.io.File;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import junit.framework.TestCase;
+
+import org.apache.derby.drda.NetworkServerControl;
+import org.wamblee.io.FileSystemUtils;
+
+/**
+ * Derby database setup. The external JDBC url used to connect to a running
+ * instance is
+ *
+ * <pre>
+ * jdbc:derby:net://localhost:1527/testdb
+ * </pre>
+ *
+ * and the driver class is
+ *
+ * <pre>
+ * com.ibm.db2.jcc.DB2Driver
+ * </pre>
+ *
+ * The following jars will have to be used <code>db2jcc.jar</code> and
+ * <code>db2jcc_license_c.jar</code>.
+ */
+public class DerbyDatabase extends AbstractDatabase {
+
+ /**
+ * Logger.
+ */
+ private static final Logger LOGGER = Logger.getLogger(DerbyDatabase.class
+ .getName());
+
+ /**
+ * Database user name.
+ */
+ private static final String USERNAME = "sa";
+
+ /**
+ * Database password.
+ */
+ private static final String PASSWORD = "123";
+ /**
+ * Poll interval for the checking the server status.
+ */
+ private static final int POLL_INTERVAL = 100;
+
+ /**
+ * Maximum time to wait until the server has started or stopped.
+ */
+ private static final int MAX_WAIT_TIME = 10000;
+
+ /**
+ * Database name to use.
+ */
+ private static final String DATABASE_NAME = "testdb";
+
+ /**
+ * Path on the file system where derby files are stored.
+ */
+ private static final String DATABASE_PATH = "target/db/persistence/derby";
+
+ /**
+ * Derby property required to set the file system path
+ * {@link #DATABASE_PATH}.
+ */
+ private static final String SYSTEM_PATH_PROPERTY = "derby.system.home";
+
+
+ private boolean inmemory;
+
+
+ /**
+ * Constructs derby database class to allow creation of derby database
+ * instances.
+ */
+ public DerbyDatabase() {
+ inmemory = true;
+ }
+
+ public DerbyDatabase(boolean aInMemoryFlag) {
+ inmemory = aInMemoryFlag;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.wamblee.persistence.Database#start()
+ */
+ public void doStart() {
+ try {
+ // just in case a previous run was killed without the
+ // cleanup
+ cleanPersistentStorage();
+
+ if (!inmemory) {
+ // set database path.
+ Properties lProperties = System.getProperties();
+ lProperties.put(SYSTEM_PATH_PROPERTY, DATABASE_PATH);
+ }
+
+ Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();
+
+ runDatabase();
+
+ waitUntilStartedOrStopped(true);
+
+ // Force creation of the database.
+ Connection lConnection = createConnection();
+ lConnection.close();
+
+ LOGGER.info("Database started: \n URL = " + getExternalJdbcUrl() + "\n user = " + getUsername() + "\n password = "
+ + getPassword());
+
+ createDataSource();
+
+ Runtime.getRuntime().addShutdownHook(new Thread() {
+ @Override
+ public void run() {
+ if (isStarted()) {
+ LOGGER.warning("Shutting down db");
+ DerbyDatabase.this.stop();
+ }
+ }
+ });
+ } catch (Exception e) {
+ throw new RuntimeException("Problem starting database", e);
+ }
+ }
+
+ /**
+ * Waits until the database server has started or stopped.
+ *
+ * @param aStarted
+ * If true, waits until the server is up, if false, waits until
+ * the server is down.
+ * @throws InterruptedException
+ */
+ private void waitUntilStartedOrStopped(boolean aStarted)
+ throws InterruptedException {
+ long lWaited = 0;
+
+ while (aStarted != isStarted()) {
+ Thread.sleep(POLL_INTERVAL);
+ lWaited += POLL_INTERVAL;
+
+ if (lWaited > MAX_WAIT_TIME) {
+ throw new RuntimeException(
+ "Derby database did not start within " + MAX_WAIT_TIME
+ + "ms");
+ }
+ }
+ }
+
+ /**
+ * Checks if the database server has started or not.
+ *
+ * @return True if started, false otherwise.
+ */
+ private boolean isStarted() {
+ try {
+ getControl().ping();
+
+ return true;
+ } catch (Exception e) {
+ return false;
+ }
+ }
+
+ /**
+ * Gets the controller for the database server.
+ *
+ * @return Controller.
+ * @throws Exception
+ */
+ private NetworkServerControl getControl() throws Exception {
+ return new NetworkServerControl();
+ }
+
+ /**
+ * Runs the database.
+ *
+ */
+ private void runDatabase() {
+ try {
+ getControl().start(new PrintWriter(System.out));
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.wamblee.persistence.Database#getJdbcUrl()
+ */
+ public String getJdbcUrl() {
+ return getBaseJdbcUrl()
+ + ";create=true;retrieveMessagesFromServerOnGetMessage=true;";
+ }
+
+ private String getBaseJdbcUrl() {
+ return (inmemory ? "jdbc:derby:memory:": "jdbc:derby:") + DATABASE_NAME;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.wamblee.persistence.Database#getExternalJdbcUrl()
+ */
+ public String getExternalJdbcUrl() {
+ return "jdbc:derby://localhost:1527/" + (inmemory ? "memory:" : "") + DATABASE_NAME;
+ }
+
+ /**
+ * Shuts down the derby database and cleans up all created files.
+ *
+ */
+ private void shutdownDerby() {
+ try {
+ DriverManager.getConnection("jdbc:derby:;shutdown=true");
+ throw new RuntimeException("Derby did not shutdown, "
+ + " should always throw exception at shutdown");
+ } catch (Exception e) {
+ LOGGER.info("Derby has been shut down.");
+ }
+ }
+
+ /**
+ * Gets the user name.
+ */
+ public String getUsername() {
+ return USERNAME;
+ }
+
+ /**
+ * Gets the password.
+ *
+ * @return
+ */
+ public String getPassword() {
+ return PASSWORD;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.wamblee.persistence.Database#createConnection()
+ */
+ public Connection createConnection() throws SQLException {
+ Connection c = DriverManager.getConnection(getJdbcUrl(), getUsername(),
+ getPassword());
+
+ return c;
+ }
+
+
+ /**
+ * Stops the derby database and cleans up all derby files.
+ */
+ public void doStop() {
+ try {
+ // shutdown network server.
+ getControl().shutdown();
+ waitUntilStartedOrStopped(false);
+
+ // shutdown inmemory access.
+ shutdownDerby();
+ cleanPersistentStorage();
+ } catch (Exception e) {
+ LOGGER.log(Level.WARNING, "Problem stopping database", e);
+ }
+ }
+
+ /**
+ * Cleans up persistent storage of Derby.
+ */
+ private void cleanPersistentStorage() {
+ File lFile = new File(DATABASE_PATH);
+
+ if (lFile.isFile()) {
+ TestCase.fail("A regular file by the name " + DATABASE_PATH
+ + " exists, clean this up first");
+ }
+
+ if (!lFile.isDirectory()) {
+ return; // no-op already cleanup up.
+ }
+ FileSystemUtils.deleteDirRecursively(DATABASE_PATH);
+ }
+}
git://wamblee.org / utils / blobdiff