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package com.sun.appserv.management.ext.logging;
import java.util.Set;
import java.util.Collections;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import com.sun.appserv.management.base.ListenerInfo;
import com.sun.appserv.management.base.Util;
import com.sun.appserv.management.util.misc.GSetUtil;
/**
Emits {@link LogRecord} as JMX {@link Notification}.
<p>
The {@link LogRecord} is embedded within a Notification as follows:
notif.getType() => a Notification type beginning with {@link #LOG_RECORD_NOTIFICATION_PREFIX}<br>
notif.getSource() => ObjectName of {@link Logging} MBean that emitted the Notification
notif.getUserData() => Map<String,Object> with keys as described below.
<p>
To avoid deserialization problems, an actual {@link LogRecord} is <i>not</i>
transmitted. Instead, its important fields are extracted and placed into a Map
obtained as follows:
<pre><code>
final Map<String,Object> fields = (Map<String,Object>)notif.getUserData();
</code></pre>
Alternately, you may use {@link Util#getAMXNotificationValue} to extract any]
particular field.
<p>
Valid keys within the Map are:
<ul>
<li>{@link #LOG_RECORD_AS_STRING_KEY} value is the String version of the entire LogRecord</li>
</ul>
<p>
Here is an example of how to retrieve the LogRecord information when a Notification is received:
<code><pre>
final Notifcation notif = <the notification>;
final String type = notif.getType();
final LogRecord logRecord = (LogRecord){@link Util#getAMXNotificationValue}( notif, LOG_RECORD_KEY );
final String logRecordString = (String){@link Util#getAMXNotificationValue}( notif, LOG_RECORD_STRING_KEY );
</pre></code>
@since AS 9.0
*/
public interface LogRecordEmitter extends NotificationEmitter, ListenerInfo
{
/**
An emitted Notification will have this prefix for its type. Subtypes include:
<ul>
<li>{@link #LOG_RECORD_NOTIFICATION_SEVERE_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_WARNING_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_INFO_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_CONFIG_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_FINE_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_FINER_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_FINEST_TYPE}</li>
<li>{@link #LOG_RECORD_NOTIFICATION_OTHER_TYPE}</li>
</ul>
*/
/** Notification type <i>prefix</i> for a LogRecord Notification */
public static final String LOG_RECORD_NOTIFICATION_PREFIX = "com.sun.appserv.management.ext.logging.Logging.";
/** Notification type for a SEVERE LogRecord */
public static final String LOG_RECORD_SEVERE_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.SEVERE;
/** Notification type for a WARNING LogRecord */
public static final String LOG_RECORD_WARNING_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.WARNING;
/** Notification type for an INFO LogRecord */
public static final String LOG_RECORD_INFO_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.INFO;
/** Notification type for a CONFIG LogRecord */
public static final String LOG_RECORD_CONFIG_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.CONFIG;
/** Notification type for a FINE LogRecord */
public static final String LOG_RECORD_FINE_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.FINE;
/** Notification type for a FINER LogRecord */
public static final String LOG_RECORD_FINER_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.FINER;
/** Notification type for a FINEST LogRecord */
public static final String LOG_RECORD_FINEST_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + Level.FINEST;
/** Notification type for any other level eg a specific level number not equivalent to any of the standard ones */
public static final String LOG_RECORD_OTHER_NOTIFICATION_TYPE = LOG_RECORD_NOTIFICATION_PREFIX + "OTHER";
public static final Set<String> ALL_LOG_RECORD_NOTIFICATION_TYPES = Collections.unmodifiableSet(
GSetUtil.newSet( new String[]
{
LOG_RECORD_SEVERE_NOTIFICATION_TYPE,
LOG_RECORD_WARNING_NOTIFICATION_TYPE,
LOG_RECORD_INFO_NOTIFICATION_TYPE,
LOG_RECORD_CONFIG_NOTIFICATION_TYPE,
LOG_RECORD_FINE_NOTIFICATION_TYPE,
LOG_RECORD_FINER_NOTIFICATION_TYPE,
LOG_RECORD_FINEST_NOTIFICATION_TYPE,
LOG_RECORD_OTHER_NOTIFICATION_TYPE,
} ));
/**
All keys within the Map found in Notification.getUserData() have this prefix.
*/
public static final String LOG_RECORD_KEY_PREFIX = "LogRecord.";
/**
Key to access the string representation of the {@link java.util.logging.LogRecord}.
This value will always be present and non-null.
Use {@link com.sun.appserv.management.base.Util#getAMXNotificationValue}(LOG_RECORD_STRING_KEY)
to obtain this value.
*/
public static final String LOG_RECORD_AS_STRING_KEY = LOG_RECORD_KEY_PREFIX + "toString";
/** value: Level */
public static final String LOG_RECORD_LEVEL_KEY = LOG_RECORD_KEY_PREFIX + "Level";
/** value: String */
public static final String LOG_RECORD_LOGGER_NAME_KEY = LOG_RECORD_KEY_PREFIX + "LoggerName";
/** value: String */
public static final String LOG_RECORD_MESSAGE_KEY = LOG_RECORD_KEY_PREFIX + "Message";
/** value: Long */
public static final String LOG_RECORD_MILLIS_KEY = LOG_RECORD_KEY_PREFIX + "Millis";
/** value: Long */
public static final String LOG_RECORD_SEQUENCE_NUMBER_KEY = LOG_RECORD_KEY_PREFIX + "SequenceNumber";
/** value: String */
public static final String LOG_RECORD_SOURCE_CLASS_NAME_KEY = LOG_RECORD_KEY_PREFIX + "SourceClassName";
/** value: String */
public static final String LOG_RECORD_SOURCE_METHOD_NAME_KEY = LOG_RECORD_KEY_PREFIX + "SourceMethodName";
/** value: Integer */
public static final String LOG_RECORD_THREAD_ID_KEY = LOG_RECORD_KEY_PREFIX + "ThreadID";
/**
value: Throwable
<p>
All Throwables are remapped to standard java exceptions; the value will
be a Throwable, but it may not be the original Throwable as thrown on the server side.
<p>
If nothing was thrown this key will not be found in the Map.
*/
public static final String LOG_RECORD_THROWN_KEY = LOG_RECORD_KEY_PREFIX + "Thrown";
/**
value: Throwable
<p>
If LogRecord.getThrown() was non-null, this value is the innermost Throwable eg the root cause
found by following Throwable.getCause() until the innermost Throwable is reached.
<p>
If the root cause is the same as the thrown exception, then this value will not exist.
*/
public static final String LOG_RECORD_ROOT_CAUSE_KEY = LOG_RECORD_KEY_PREFIX + "ThrownRootCause";
/**
Get the number of listeners for the specified log level.
@param logLevel
@return number of listeners listening for messages of the specified level, or higher level
*/
public int getLogLevelListenerCount( final Level logLevel );
}
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