| /* |
| * 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.axis2.transport.http.server; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Default hander for failures in connection listener IOProcessors. |
| * Supports configuration of number retries, delay per retry, and uptime interval considered a success (resets number retries to zero). |
| */ |
| public class DefaultConnectionListenerFailureHandler implements ConnectionListenerFailureHandler { |
| |
| private static final Log LOG = LogFactory.getLog(DefaultConnectionListenerFailureHandler.class); |
| |
| protected int retryDelay; |
| protected int successInterval; |
| protected int maxRetries; |
| |
| private long lastFailure; |
| private long lastFirstFailure; |
| private int numRetries; |
| |
| /** |
| * Create a new DefaultConnectionListenerFailureHandler with default settings. |
| * retryDelay is 1 second, successInterval is 60 seconds, maxRetries is 10 |
| */ |
| public DefaultConnectionListenerFailureHandler() { |
| this(1000, 60000, 10); |
| } |
| |
| /** |
| * Create a new DefaultConnectionListenerFailureHandler |
| * |
| * @param retryDelay millis to wait before retrying |
| * @param successInterval millis after which an initial or retry attempt will be deemed a success, resetting retry count to 0 |
| * @param maxRetries maximum number of retries allowed without a success, after which the listener will terminate |
| */ |
| public DefaultConnectionListenerFailureHandler(int retryDelay, int successInterval, |
| int maxRetries) { |
| this.retryDelay = retryDelay; |
| this.successInterval = successInterval; |
| this.maxRetries = maxRetries; |
| this.lastFailure = this.lastFirstFailure = Long.MIN_VALUE; |
| this.numRetries = 0; |
| } |
| |
| /** |
| * Default behavior is to log a warning and attempt retry per constructor config, eventually failing with a logged error and notification. |
| * May subclass and override this method to change the behavior. |
| */ |
| public boolean failed(IOProcessor connectionListener, Throwable cause) { |
| long now = System.currentTimeMillis(); |
| if (now > lastFailure + successInterval) { |
| numRetries = 0; |
| lastFirstFailure = now; |
| } |
| lastFailure = now; |
| if (numRetries >= maxRetries) { |
| notifyAbnormalTermination( |
| connectionListener, |
| "Terminating connection listener " + connectionListener + " after " + |
| numRetries + "retries in " + (now - lastFirstFailure) / 1000 + |
| " seconds.", |
| cause); |
| return false; |
| } else { |
| numRetries++; |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("Attempt number " + numRetries + " of " + maxRetries + |
| " to reestalish connection listener " + connectionListener + |
| " due to failure ", |
| cause); |
| } |
| return true; |
| } |
| } |
| |
| /** |
| * Default bevarior is to log the error. |
| * May subclass and override this method to change behavior. |
| */ |
| public void notifyAbnormalTermination(IOProcessor connectionListener, String message, |
| Throwable cause) { |
| LOG.error(message, cause); |
| } |
| |
| } |