| // Copyright (C) 2013 The Android Open Source Project |
| // |
| // 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 com.googlesource.gerrit.plugins.rabbitmq.session.type; |
| |
| import com.google.common.flogger.FluentLogger; |
| import com.googlesource.gerrit.plugins.rabbitmq.config.Properties; |
| import com.googlesource.gerrit.plugins.rabbitmq.config.section.AMQP; |
| import com.googlesource.gerrit.plugins.rabbitmq.config.section.Gerrit; |
| import com.googlesource.gerrit.plugins.rabbitmq.config.section.Monitor; |
| import com.googlesource.gerrit.plugins.rabbitmq.session.Session; |
| import com.rabbitmq.client.AlreadyClosedException; |
| import com.rabbitmq.client.Channel; |
| import com.rabbitmq.client.Connection; |
| import com.rabbitmq.client.ConnectionFactory; |
| import com.rabbitmq.client.ShutdownSignalException; |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.security.KeyManagementException; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.commons.lang3.StringUtils; |
| |
| public abstract class AMQPSession implements Session { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| private volatile Connection connection; |
| private final AtomicInteger failureCount = new AtomicInteger(0); |
| |
| protected final Properties properties; |
| |
| public AMQPSession(Properties properties) { |
| this.properties = properties; |
| } |
| |
| @Override |
| public boolean isOpen() { |
| if (connection != null && connection.isOpen()) { |
| return true; |
| } |
| return false; |
| } |
| |
| protected Channel createChannel() { |
| if (!isOpen()) { |
| connect(); |
| } |
| if (isOpen()) { |
| AMQP amqp = properties.getSection(AMQP.class); |
| try { |
| Channel ch = connection.createChannel(); |
| int channelId = ch.getChannelNumber(); |
| ch.addShutdownListener( |
| cause -> { |
| if (cause.isInitiatedByApplication()) { |
| logger.atInfo().log("Channel #%d closed by application.", channelId); |
| } else { |
| logger.atWarning().log( |
| "Channel #%d closed. Cause: %s", channelId, cause.getMessage()); |
| } |
| }); |
| failureCount.set(0); |
| logger.atInfo().log("Channel #%d opened for %s.", channelId, amqp.uri); |
| return ch; |
| } catch (IOException | AlreadyClosedException ex) { |
| logger.atSevere().withCause(ex).log("Failed to open channel for %s.", amqp.uri); |
| failureCount.incrementAndGet(); |
| } |
| if (failureCount.get() > properties.getSection(Monitor.class).failureCount) { |
| logger.atWarning().log( |
| "Creating channel failed %d times, closing connection %s.", |
| failureCount.get(), amqp.uri); |
| disconnect(); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public synchronized boolean connect() { |
| AMQP amqp = properties.getSection(AMQP.class); |
| if (isOpen()) { |
| logger.atInfo().log("Already connected to %s.", amqp.uri); |
| return true; |
| } |
| logger.atInfo().log("Connect to %s...", amqp.uri); |
| ConnectionFactory factory = new ConnectionFactory(); |
| try { |
| if (StringUtils.isNotEmpty(amqp.uri)) { |
| factory.setUri(amqp.uri); |
| if (StringUtils.isNotEmpty(amqp.username)) { |
| factory.setUsername(amqp.username); |
| } |
| Gerrit gerrit = properties.getSection(Gerrit.class); |
| String securePassword = gerrit.getAMQPUserPassword(amqp.username); |
| if (StringUtils.isNotEmpty(securePassword)) { |
| factory.setPassword(securePassword); |
| } else if (StringUtils.isNotEmpty(amqp.password)) { |
| factory.setPassword(amqp.password); |
| } |
| connection = factory.newConnection(); |
| connection.addShutdownListener( |
| cause -> { |
| if (cause.isInitiatedByApplication()) { |
| logger.atInfo().log("Connection closed by application."); |
| } else { |
| logger.atWarning().log("Connection closed. Cause: %s", cause.getMessage()); |
| } |
| }); |
| logger.atInfo().log("Connection established to %s.", amqp.uri); |
| return true; |
| } |
| } catch (URISyntaxException ex) { |
| logger.atSevere().log("URI syntax error: %s", amqp.uri); |
| } catch (IOException | TimeoutException ex) { |
| logger.atSevere().withCause(ex).log("Connection to %s cannot be opened.", amqp.uri); |
| } catch (KeyManagementException | NoSuchAlgorithmException ex) { |
| logger.atSevere().withCause(ex).log( |
| "Security error when opening connection to %s.", amqp.uri); |
| } |
| return false; |
| } |
| |
| @Override |
| public void disconnect() { |
| try { |
| if (connection != null) { |
| logger.atInfo().log("Closing Connection..."); |
| connection.close(); |
| } |
| } catch (IOException | ShutdownSignalException ex) { |
| logger.atWarning().withCause(ex).log("Error when closing connection."); |
| } finally { |
| connection = null; |
| } |
| } |
| } |