001/*
002 * CDDL HEADER START
003 *
004 * The contents of this file are subject to the terms of the
005 * Common Development and Distribution License, Version 1.0 only
006 * (the "License").  You may not use this file except in compliance
007 * with the License.
008 *
009 * You can obtain a copy of the license at
010 * docs/licenses/cddl.txt
011 * or http://www.opensource.org/licenses/cddl1.php.
012 * See the License for the specific language governing permissions
013 * and limitations under the License.
014 *
015 * When distributing Covered Code, include this CDDL HEADER in each
016 * file and include the License file at
017 * docs/licenses/cddl.txt.  If applicable,
018 * add the following below this CDDL HEADER, with the fields enclosed
019 * by brackets "[]" replaced with your own identifying information:
020 *      Portions Copyright [yyyy] [name of copyright owner]
021 *
022 * CDDL HEADER END
023 *
024 *
025 *      Copyright 2010-2017 Ping Identity Corporation
026 */
027package com.unboundid.directory.sdk.common.scripting;
028
029
030
031import java.util.List;
032
033import com.unboundid.directory.sdk.broker.internal.BrokerExtension;
034import com.unboundid.directory.sdk.common.config.ErrorLoggerConfig;
035import com.unboundid.directory.sdk.common.internal.Reconfigurable;
036import com.unboundid.directory.sdk.common.types.LogCategory;
037import com.unboundid.directory.sdk.common.types.LogSeverity;
038import com.unboundid.directory.sdk.common.types.ServerContext;
039import com.unboundid.directory.sdk.metrics.internal.MetricsEngineExtension;
040import com.unboundid.directory.sdk.proxy.internal.DirectoryProxyServerExtension;
041import com.unboundid.directory.sdk.ds.internal.DirectoryServerExtension;
042import com.unboundid.directory.sdk.sync.internal.SynchronizationServerExtension;
043import com.unboundid.ldap.sdk.LDAPException;
044import com.unboundid.ldap.sdk.ResultCode;
045import com.unboundid.util.Extensible;
046import com.unboundid.util.ThreadSafety;
047import com.unboundid.util.ThreadSafetyLevel;
048import com.unboundid.util.args.ArgumentException;
049import com.unboundid.util.args.ArgumentParser;
050
051
052
053/**
054 * This class defines an API that must be implemented by scripted extensions
055 * which record information about warnings, errors, and events which occur in
056 * the server.
057 * <BR><BR>
058 * Each error logger may be configured to indicate whether to include or
059 * exclude log messages based on their category and/or severity.  This is
060 * handled automatically by the server, so individual error logger
061 * implementations no not need to attempt to perform that filtering on their
062 * own.  However, they may perform additional processing if desired to further
063 * narrow the set of messages that should be logged.
064 * <BR>
065 * <H2>Configuring Groovy-Scripted Error Loggers</H2>
066 * In order to configure a scripted error logger based on this API and written
067 * in the Groovy scripting language, use a command
068 * like:
069 * <PRE>
070 *      dsconfig create-log-publisher \
071 *           --publisher-name "<I>{logger-name}</I>" \
072 *           --type groovy-scripted-error \
073 *           --set enabled:true \
074 *           --set "script-class:<I>{class-name}</I>" \
075 *           --set "script-argument:<I>{name=value}</I>"
076 * </PRE>
077 * where "<I>{logger-name}</I>" is the name to use for the error logger
078 * instance, "<I>{class-name}</I>" is the fully-qualified name of the Groovy
079 * class written using this API, and "<I>{name=value}</I>" represents name-value
080 * pairs for any arguments to provide to the logger.  If multiple arguments
081 * should be provided to the logger, then the
082 * "<CODE>--set script-argument:<I>{name=value}</I></CODE>" option should be
083 * provided multiple times.
084 *
085 * @see  com.unboundid.directory.sdk.common.api.ErrorLogger
086 * @see  com.unboundid.directory.sdk.common.api.FileBasedErrorLogger
087 * @see  ScriptedFileBasedErrorLogger
088 */
089@Extensible()
090@DirectoryServerExtension()
091@DirectoryProxyServerExtension(appliesToLocalContent=true,
092     appliesToRemoteContent=false)
093@SynchronizationServerExtension(appliesToLocalContent=true,
094     appliesToSynchronizedContent=false)
095@MetricsEngineExtension()
096@BrokerExtension()
097@ThreadSafety(level=ThreadSafetyLevel.INTERFACE_THREADSAFE)
098public abstract class ScriptedErrorLogger
099       implements Reconfigurable<ErrorLoggerConfig>
100{
101  /**
102   * Creates a new instance of this error logger.  All error logger
103   * implementations must include a default constructor, but any initialization
104   * should generally be done in the {@code initializeErrorLogger} method.
105   */
106  public ScriptedErrorLogger()
107  {
108    // No implementation is required.
109  }
110
111
112
113  /**
114   * {@inheritDoc}
115   */
116  public void defineConfigArguments(final ArgumentParser parser)
117         throws ArgumentException
118  {
119    // No arguments will be allowed by default.
120  }
121
122
123
124  /**
125   * Initializes this error logger.
126   *
127   * @param  serverContext  A handle to the server context for the server in
128   *                        which this extension is running.
129   * @param  config         The general configuration for this error logger.
130   * @param  parser         The argument parser which has been initialized from
131   *                        the configuration for this error logger.
132   *
133   * @throws  LDAPException  If a problem occurs while initializing this
134   *                         error logger.
135   */
136  public void initializeErrorLogger(final ServerContext serverContext,
137                                    final ErrorLoggerConfig config,
138                                    final ArgumentParser parser)
139         throws LDAPException
140  {
141    // No initialization will be performed by default.
142  }
143
144
145
146  /**
147   * Performs any cleanup which may be necessary when this error logger is to be
148   * taken out of service.
149   */
150  public void finalizeErrorLogger()
151  {
152    // No implementation is required.
153  }
154
155
156
157  /**
158   * {@inheritDoc}
159   */
160  public boolean isConfigurationAcceptable(final ErrorLoggerConfig config,
161                      final ArgumentParser parser,
162                      final List<String> unacceptableReasons)
163  {
164    // No extended validation will be performed.
165    return true;
166  }
167
168
169
170  /**
171   * {@inheritDoc}
172   */
173  public ResultCode applyConfiguration(final ErrorLoggerConfig config,
174                                       final ArgumentParser parser,
175                                       final List<String> adminActionsRequired,
176                                       final List<String> messages)
177  {
178    // By default, no configuration changes will be applied.  If there are any
179    // arguments, then add an admin action message indicating that the extension
180    // needs to be restarted for any changes to take effect.
181    if (! parser.getNamedArguments().isEmpty())
182    {
183      adminActionsRequired.add(
184           "No configuration change has actually been applied.  The new " +
185                "configuration will not take effect until this error logger " +
186                "is disabled and re-enabled or until the server is restarted.");
187    }
188
189    return ResultCode.SUCCESS;
190  }
191
192
193
194  /**
195   * Records information about the provided message, if appropriate.
196   *
197   * @param  category   The category for the message to be logged.
198   * @param  severity   The severity for the message to be logged.
199   * @param  messageID  The unique identifier with which the message text is
200   *                    associated.
201   * @param  message    The message to be logged.
202   */
203  public abstract void logError(final LogCategory category,
204                                final LogSeverity severity,
205                                final long messageID, final String message);
206}