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    1   /*
    2    * Copyright [2007] [University Corporation for Advanced Internet Development, Inc.]
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    * http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package edu.internet2.middleware.shibboleth.wayf;
    18
    19  import java.util.Timer;
    20
    21  import org.opensaml.util.resource.FilesystemResource;
    22  import org.opensaml.util.resource.Resource;
    23  import org.opensaml.util.resource.ResourceChangeWatcher;
    24  import org.opensaml.util.resource.ResourceException;
    25  import org.slf4j.LoggerFactory;
    26
    27  import ch.qos.logback.classic.LoggerContext;
    28  import ch.qos.logback.core.status.ErrorStatus;
    29  import ch.qos.logback.core.status.StatusManager;
    30
    31  /**
    32   * Simple logging service that watches for logback configuration file changes and reloads the file when a change occurs.
    33   */
    34  public class LogbackLoggingService {
    35
    36      /** Timer used periodically read the logging configuration file. */
    37      private Timer taskTimer;
    38
    39      /**
    40       * Constructor.
    41       *
    42       * @param loggingConfigurationFile logback configuration file
    43       * @param pollingFrequency frequency the configuration file should be checked for changes
    44       */
    45      public LogbackLoggingService(String loggingConfigurationFile, long pollingFrequency) {
    46          LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
    47          StatusManager statusManager = loggerContext.getStatusManager();
    48
    49          try{
    50              Resource configResource = new FilesystemResource(loggingConfigurationFile);
    51              LogbackConfigurationChangeListener configChangeListener = new LogbackConfigurationChangeListener();
    52              configChangeListener.onResourceCreate(configResource);
    53
    54              ResourceChangeWatcher resourceWatcher = new ResourceChangeWatcher(configResource, pollingFrequency, 5);
    55              resourceWatcher.getResourceListeners().add(configChangeListener);
    56
    57              taskTimer = new Timer(true);
    58              taskTimer.schedule(resourceWatcher, 0, pollingFrequency);
    59          }catch(ResourceException e){
    60              statusManager.add(new ErrorStatus("Error loading logging configuration file: "
    61                      + loggingConfigurationFile, this, e));
    62          }
    63      }
    64  }