/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2009 Sun Microsystems, Inc.
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* Portions Copyright 2014-2015 ForgeRock AS
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*/
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package org.opends.server.loggers;
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import java.util.List;
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import org.forgerock.i18n.LocalizableMessage;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.DebugTargetCfg;
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import org.forgerock.opendj.config.server.ConfigChangeResult;
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/**
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* This class encapsulates the trace settings in effect at a given tracing scope.
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*/
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public class TraceSettings implements
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ConfigurationChangeListener<DebugTargetCfg>
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{
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/** A TraceSettings object representing a fully disabled trace state. */
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public static final TraceSettings DISABLED =
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new TraceSettings(Level.DISABLED);
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private static final String STACK_DUMP_KEYWORD = "stack";
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private static final String INCLUDE_CAUSE_KEYWORD = "cause";
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private static final String SUPPRESS_ARG_KEYWORD = "noargs";
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private static final String SUPPRESS_RETVAL_KEYWORD = "noretval";
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private static final String ENABLED_KEYWORD = "enabled";
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private static final String EXCEPTIONS_ONLY_KEYWORD = "exceptionsonly";
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/**
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* Represents the level of trace.
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*/
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enum Level
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{
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/** Log nothing. **/
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DISABLED,
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/** Log only exceptions. **/
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EXCEPTIONS_ONLY,
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/** Log everything. */
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ALL;
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/**
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* Returns the level corresponding to provided options.
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*
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* @param isEnabled
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* Indicates if tracer is enabled.
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* @param isDebugExceptionsOnly
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* Indicates if tracer should log only exceptions.
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* @return the level corresponding to options
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*/
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static Level getLevel(boolean isEnabled, boolean isDebugExceptionsOnly)
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{
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if (isEnabled)
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{
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if (isDebugExceptionsOnly)
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{
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return Level.EXCEPTIONS_ONLY;
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}
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else
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{
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return Level.ALL;
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}
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}
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return Level.DISABLED;
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}
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}
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/**
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* The level of this setting.
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*/
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private Level level;
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/**
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* Indicates if method arguments should be logged.
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*/
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private boolean noArgs;
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/**
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* Indicates if method return values should be logged.
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*/
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private boolean noRetVal;
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/**
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* The level of stack frames to include.
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*/
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private int stackDepth;
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/**
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* Indicates if the cause exception is included in exception messages.
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*/
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private boolean includeCause;
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private DebugTargetCfg currentConfig;
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/**
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* Construct new trace settings with default values.
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*/
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public TraceSettings()
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{
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this(Level.ALL, false, false, 0, false);
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}
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/**
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* Construct new trace settings at provided level.
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*
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* @param level
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* Level for this settings.
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*/
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private TraceSettings(Level level)
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{
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this(level, false, false, 0, false);
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}
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/**
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* Construct new trace settings at the specified level. Optionally turn off
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* arguments, return value in entry and exit messages, and specifying the
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* depth of stack traces and whether to include the cause of exceptions.
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*
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* @param level
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* the level for this setting.
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* @param noArgs
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* whether to include arguments in the log messages.
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* @param noRetVal
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* whether to include return values in the log messages.
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* @param stackDepth
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* the stack depth to display in log messages.
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* @param includeCause
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* whether to include the cause of exceptions.
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*/
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TraceSettings(Level level, boolean noArgs,
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boolean noRetVal, int stackDepth, boolean includeCause)
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{
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this.level = level;
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this.noArgs = noArgs;
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this.noRetVal = noRetVal;
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this.stackDepth = stackDepth;
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this.includeCause = includeCause;
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}
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/**
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* Construct a new trace settings from the provided configuration.
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*
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* @param config
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* The debug target configuration that contains the information to
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* use to initialize this trace setting.
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*/
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TraceSettings(DebugTargetCfg config)
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{
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this.level =
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Level.getLevel(config.isEnabled(), config.isDebugExceptionsOnly());
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this.noArgs = config.isOmitMethodEntryArguments();
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this.noRetVal = config.isOmitMethodReturnValue();
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this.stackDepth = config.getThrowableStackFrames();
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this.includeCause = config.isIncludeThrowableCause();
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currentConfig = config;
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config.addChangeListener(this);
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}
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/** {@inheritDoc} */
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public boolean isConfigurationChangeAcceptable(DebugTargetCfg config,
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List<LocalizableMessage> unacceptableReasons)
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{
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// This should alwas be acceptable. We are assuing that the scope for this
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// trace setting is the same sine its part of the DN.
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return true;
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}
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/** {@inheritDoc} */
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public ConfigChangeResult applyConfigurationChange(DebugTargetCfg config)
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{
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final ConfigChangeResult ccr = new ConfigChangeResult();
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// We can assume that the target scope did not change since its the
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// naming attribute. Changing it would result in a modify DN.
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this.level =
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Level.getLevel(config.isEnabled(), config.isDebugExceptionsOnly());
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this.noArgs = config.isOmitMethodEntryArguments();
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this.noRetVal = config.isOmitMethodReturnValue();
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this.stackDepth = config.getThrowableStackFrames();
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this.includeCause = config.isIncludeThrowableCause();
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this.currentConfig = config;
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return ccr;
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}
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/**
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* Parse trace settings from the string representation.
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*
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* @param value
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* the trace settings string to be parsed.
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* @return the trace settings parsed from the string.
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*/
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protected static TraceSettings parseTraceSettings(String value)
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{
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TraceSettings settings = null;
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if (value != null)
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{
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boolean enabled = false;
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boolean exceptionsOnly = false;
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boolean noArgs = false;
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boolean noRetVal = false;
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int stackDepth = 0;
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boolean includeCause = false;
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String[] keywords = value.split(",");
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for (String keyword : keywords)
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{
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//See if stack dump keyword is included
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if (keyword.startsWith(STACK_DUMP_KEYWORD))
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{
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//See if a stack depth is included
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if (keyword.length() == STACK_DUMP_KEYWORD.length())
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{
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stackDepth = DebugStackTraceFormatter.COMPLETE_STACK;
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}
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else
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{
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int depthStart = keyword.indexOf("=", STACK_DUMP_KEYWORD.length());
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if (depthStart == STACK_DUMP_KEYWORD.length())
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{
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try
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{
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stackDepth = Integer.valueOf(keyword.substring(depthStart + 1));
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}
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catch (NumberFormatException nfe)
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{ // TODO: i18n
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System.err.println("The keyword " + STACK_DUMP_KEYWORD
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+ " contains an invalid depth value. The complete stack "
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+ "will be included.");
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}
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}
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}
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}
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//See if to include cause in exception messages.
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else if (keyword.equals(INCLUDE_CAUSE_KEYWORD))
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{
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includeCause = true;
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}
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//See if to supress method arguments.
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else if (keyword.equals(SUPPRESS_ARG_KEYWORD))
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{
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noArgs = true;
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}
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//See if to supress return values.
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else if (keyword.equals(SUPPRESS_RETVAL_KEYWORD))
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{
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noRetVal = true;
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}
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else if (keyword.equals(ENABLED_KEYWORD))
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{
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enabled = true;
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}
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else if (keyword.equals(EXCEPTIONS_ONLY_KEYWORD))
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{
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exceptionsOnly = true;
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}
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}
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settings =
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new TraceSettings(Level.getLevel(enabled, exceptionsOnly),
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noArgs, noRetVal, stackDepth, includeCause);
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}
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return settings;
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}
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/**
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* Get the level of this setting.
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*
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* @return the level of this setting.
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*/
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public Level getLevel()
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{
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return level;
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}
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/**
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* Get whether method arguments should be logged.
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*
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* @return if method arguments should be logged.
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*/
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public boolean isNoArgs()
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{
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return noArgs;
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}
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/**
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* Get whether method return values should be logged.
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*
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* @return if method return values should be logged.
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*/
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public boolean isNoRetVal()
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{
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return noRetVal;
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}
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/**
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* Get the level of stack frames to include.
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*
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* @return the level of stack frames to include.
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*/
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public int getStackDepth()
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{
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return stackDepth;
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}
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/**
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* Get whether the cause exception is included in exception messages.
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*
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* @return if the cause exception is included in exception messages.
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*/
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public boolean isIncludeCause()
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{
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return includeCause;
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}
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}
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