/*
* Copyright 2015 Groupon, Inc
* Copyright 2015 The Billing Project, LLC
*
* The Billing Project 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.killbill.bus;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.eventbus.AllowConcurrentEvents;
import com.google.common.eventbus.Subscribe;
import com.google.common.io.Resources;
import org.killbill.TestSetup;
import org.killbill.bus.api.BusEvent;
import org.killbill.bus.api.PersistentBus;
import org.killbill.commons.embeddeddb.mysql.MySQLEmbeddedDB;
import org.testng.Assert;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;
import java.util.UUID;
public class TestPersistentBusDemo {
private MySQLEmbeddedDB embeddedDB;
private DefaultPersistentBus bus;
private DataSource dataSource;
@BeforeClass(groups = "slow")
public void beforeClass() throws Exception {
embeddedDB = new MySQLEmbeddedDB("killbillq", "killbillq", "killbillq");
embeddedDB.initialize();
embeddedDB.start();
final String ddl = TestSetup.toString(Resources.getResource("org/killbill/queue/ddl.sql").openStream());
embeddedDB.executeScript(ddl);
final String ddlTest = TestSetup.toString(Resources.getResource("queue/ddl_test.sql").openStream());
embeddedDB.executeScript(ddlTest);
embeddedDB.refreshTableNames();
dataSource = embeddedDB.getDataSource();
final Properties properties = new Properties();
properties.setProperty("org.killbill.persistent.bus.main.inMemory", "false");
properties.setProperty("org.killbill.persistent.bus.main.queue.mode", "STICKY_POLLING");
properties.setProperty("org.killbill.persistent.bus.main.max.failure.retry", "3");
properties.setProperty("org.killbill.persistent.bus.main.claimed", "1");
properties.setProperty("org.killbill.persistent.bus.main.claim.time", "5m");
properties.setProperty("org.killbill.persistent.bus.main.sleep", "100");
properties.setProperty("org.killbill.persistent.bus.main.off", "false");
properties.setProperty("org.killbill.persistent.bus.main.nbThreads", "1");
properties.setProperty("org.killbill.persistent.bus.main.queue.capacity", "3000");
properties.setProperty("org.killbill.persistent.bus.main.tableName", "bus_events");
properties.setProperty("org.killbill.persistent.bus.main.historyTableName", "bus_events_history");
bus = new DefaultPersistentBus(dataSource, properties);
}
@BeforeMethod(groups = "slow")
public void beforeMethod() throws Exception {
embeddedDB.cleanupAllTables();
bus.start();
}
@AfterMethod(groups = "slow")
public void afterMethod() throws Exception {
bus.stop();
}
@Test(groups = "slow")
public void testDemo() throws SQLException, PersistentBus.EventBusException {
// Create a Handler (with @Subscribe method)
final DummyHandler handler = new DummyHandler();
bus.register(handler);
// Extract connection from dataSource
final Connection connection = dataSource.getConnection();
final DummyEvent event = new DummyEvent("foo", 1L, 2L, UUID.randomUUID());
PreparedStatement stmt = null;
try {
// In one transaction we both insert a dummy value in some table, and post the event (using same connection/transaction)
connection.setAutoCommit(false);
stmt = connection.prepareStatement("insert into dummy (dkey, dvalue) values (?, ?)");
stmt.setString(1, "Great!");
stmt.setLong(2, 47L);
stmt.executeUpdate();
bus.postFromTransaction(event, connection);
connection.commit();
} finally {
if (stmt != null) {
stmt.close();
}
if (connection != null) {
connection.close();
}
}
//
// Verify we see the dummy value inserted and also received the event posted
//
final Connection connection2 = dataSource.getConnection();
PreparedStatement stmt2 = null;
try {
stmt2 = connection2.prepareStatement("select * from dummy where dkey = ?");
stmt2.setString(1, "Great!");
final ResultSet rs2 = stmt2.executeQuery();
int found = 0;
while (rs2.next()) {
found++;
}
Assert.assertEquals(found, 1);
} finally {
stmt2.close();
}
if (connection2 != null) {
connection2.close();
}
Assert.assertTrue(handler.waitForCompletion(1, 3000));
}
public static class DummyEvent implements BusEvent {
private final String name;
private final Long searchKey1;
private final Long searchKey2;
private final UUID userToken;
@JsonCreator
public DummyEvent(@JsonProperty("name") final String name,
@JsonProperty("searchKey1") final Long searchKey1,
@JsonProperty("searchKey2") final Long searchKey2,
@JsonProperty("userToken") final UUID userToken) {
this.name = name;
this.searchKey2 = searchKey2;
this.searchKey1 = searchKey1;
this.userToken = userToken;
}
public String getName() {
return name;
}
@Override
public Long getSearchKey1() {
return searchKey1;
}
@Override
public Long getSearchKey2() {
return searchKey2;
}
@Override
public UUID getUserToken() {
return userToken;
}
}
public static class DummyHandler {
private int nbEvents;
public DummyHandler() {
nbEvents = 0;
}
@AllowConcurrentEvents
@Subscribe
public void processEvent(final DummyEvent event) {
//System.out.println("YEAH!!!!! event = " + event);
nbEvents++;
}
public synchronized boolean waitForCompletion(final int expectedEvents, final long timeoutMs) {
final long ini = System.currentTimeMillis();
long remaining = timeoutMs;
while (nbEvents < expectedEvents && remaining > 0) {
try {
wait(1000);
if (nbEvents == expectedEvents) {
break;
}
remaining = timeoutMs - (System.currentTimeMillis() - ini);
} catch (final InterruptedException ignore) {
}
}
return (nbEvents == expectedEvents);
}
}
}