/**
 * 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 org.apache.activemq.broker.ft;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URI;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.logging.Logger;

import javax.sql.DataSource;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.store.jdbc.DataSourceServiceSupport;
import org.apache.activemq.store.jdbc.JDBCPersistenceAdapter;
import org.apache.activemq.util.IOHelper;
import org.apache.derby.jdbc.EmbeddedDataSource;

public class JDBCQueueMasterSlaveTest extends QueueMasterSlaveTestSupport {
    protected DataSource sharedDs;
    protected String MASTER_URL = "tcp://localhost:62001";
    protected String SLAVE_URL  = "tcp://localhost:62002";

    protected void setUp() throws Exception {
        // startup db
        sharedDs = new SyncDataSource((EmbeddedDataSource) DataSourceServiceSupport.createDataSource(IOHelper.getDefaultDataDirectory()));
        super.setUp();
    }

    protected void createMaster() throws Exception {
        master = new BrokerService();
        master.setBrokerName("master");
        master.addConnector(MASTER_URL);
        master.setUseJmx(false);
        master.setPersistent(true);
        master.setDeleteAllMessagesOnStartup(true);
        JDBCPersistenceAdapter persistenceAdapter = new JDBCPersistenceAdapter();
        persistenceAdapter.setDataSource(getExistingDataSource());
        configureJdbcPersistenceAdapter(persistenceAdapter);
        master.setPersistenceAdapter(persistenceAdapter);
        configureBroker(master);
        master.start();
    }

    protected void configureBroker(BrokerService master) {
    }

    protected void createSlave() throws Exception {
        // use a separate thread as the slave will block waiting for
        // the exclusive db lock
        Thread t = new Thread() {
            public void run() {
                try {
                    BrokerService broker = new BrokerService();
                    broker.setBrokerName("slave");
                    TransportConnector connector = new TransportConnector();
                    connector.setUri(new URI(SLAVE_URL));
                    broker.addConnector(connector);
                    // no need for broker.setMasterConnectorURI(masterConnectorURI)
                    // as the db lock provides the slave/master initialisation
                    broker.setUseJmx(false);
                    broker.setPersistent(true);
                    JDBCPersistenceAdapter persistenceAdapter = new JDBCPersistenceAdapter();
                    persistenceAdapter.setDataSource(getExistingDataSource());
                    persistenceAdapter.setCreateTablesOnStartup(false);
                    broker.setPersistenceAdapter(persistenceAdapter);
                    configureJdbcPersistenceAdapter(persistenceAdapter);
                    configureBroker(broker);
                    broker.start();
                    slave.set(broker);
                    slaveStarted.countDown();
                } catch (IllegalStateException expectedOnShutdown) {
                } catch (Exception e) {
                    fail("failed to start slave broker, reason:" + e);
                }
            }
        };
        t.start();
    }

    protected void configureJdbcPersistenceAdapter(JDBCPersistenceAdapter persistenceAdapter) throws IOException {
        persistenceAdapter.setLockKeepAlivePeriod(500);
        persistenceAdapter.getLocker().setLockAcquireSleepInterval(500);
    }

    protected DataSource getExistingDataSource() throws Exception {
        return sharedDs;
    }

    // prevent concurrent calls from attempting to create the db at the same time
    // can result in "already exists in this jvm" errors
    class SyncDataSource implements DataSource {
        final EmbeddedDataSource delegate;
        SyncDataSource(EmbeddedDataSource dataSource) {
            this.delegate = dataSource;
        }
            @Override
            public Connection getConnection() throws SQLException {
                synchronized (this) {
                    return delegate.getConnection();
                }
            }

            @Override
            public Connection getConnection(String username, String password) throws SQLException {
                synchronized (this) {
                    return delegate.getConnection();
                }
            }

            @Override
            public PrintWriter getLogWriter() throws SQLException {
                return null;
            }

            @Override
            public void setLogWriter(PrintWriter out) throws SQLException {
            }

            @Override
            public void setLoginTimeout(int seconds) throws SQLException {
            }

            @Override
            public int getLoginTimeout() throws SQLException {
                return 0;
            }

            @Override
            public <T> T unwrap(Class<T> iface) throws SQLException {
                return null;
            }

            @Override
            public boolean isWrapperFor(Class<?> iface) throws SQLException {
                return false;
            }

            EmbeddedDataSource getDelegate() {
                return delegate;
            }

            public Logger getParentLogger() throws SQLFeatureNotSupportedException {
                return null;
            }
        };
}
