org.osgi.service.log.LogEntry Maven / Gradle / Ivy
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/*
* Copyright (c) OSGi Alliance (2000, 2017). All Rights Reserved.
*
* Licensed 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.osgi.service.log;
import org.osgi.annotation.versioning.ProviderType;
import org.osgi.framework.Bundle;
import org.osgi.framework.ServiceReference;
/**
* Provides methods to access the information contained in an individual Log
* Service log entry.
*
*
* A {@code LogEntry} object may be acquired from the
* {@code LogReaderService.getLog} method or by registering a
* {@code LogListener} object.
*
* @ThreadSafe
* @author $Id: 9dca75876a3be67c923cd5a55b59dd63f69d6fbc $
*/
@ProviderType
public interface LogEntry {
/**
* Returns the bundle that created this {@code LogEntry} object.
*
* @return The bundle that created this {@code LogEntry} object;
* {@code null} if no bundle is associated with this
* {@code LogEntry} object.
*/
Bundle getBundle();
/**
* Returns the {@code ServiceReference} object for the service associated
* with this {@code LogEntry} object.
*
* @return {@code ServiceReference} object for the service associated with
* this {@code LogEntry} object; {@code null} if no
* {@code ServiceReference} object was provided.
*/
ServiceReference< ? > getServiceReference();
/**
* Returns the integer level of this {@code LogEntry} object.
*
* If one of the {@code log} methods of {@link LogService} was used, this is
* the specified integer level. Otherwise, this is the
* {@link LogLevel#ordinal() ordinal} value of the {@link #getLogLevel() log
* level}.
*
* @return Integer level of this {@code LogEntry} object.
* @deprecated Since 1.4. Replaced by {@link #getLogLevel()}.
*/
@Deprecated
int getLevel();
/**
* Returns the formatted message associated with this {@code LogEntry}
* object.
*
* @return {@code String} containing the formatted message associated with
* this {@code LogEntry} object.
*/
String getMessage();
/**
* Returns the exception object associated with this {@code LogEntry}
* object.
*
*
* In some implementations, the returned exception may not be the original
* exception. To avoid references to a bundle defined exception class, thus
* preventing an uninstalled bundle from being garbage collected, the Log
* Service may return an exception object of an implementation defined
* Throwable subclass. The returned object will attempt to provide as much
* information as possible from the original exception object such as the
* message and stack trace.
*
* @return {@code Throwable} object of the exception associated with this
* {@code LogEntry};{@code null} if no exception is associated with
* this {@code LogEntry} object.
*/
Throwable getException();
/**
* Returns the value of {@code currentTimeMillis()} at the time this
* {@code LogEntry} object was created.
*
* @return The system time in milliseconds when this {@code LogEntry} object
* was created.
* @see "System.currentTimeMillis()"
*/
long getTime();
/**
* Returns the level of this {@code LogEntry} object.
*
* @return The level of this {@code LogEntry} object.
* @since 1.4
*/
LogLevel getLogLevel();
/**
* Returns the name of the {@link Logger} object used to create this
* {@code LogEntry} object.
*
* @return The name of the {@link Logger} object used to create this
* {@code LogEntry} object.
* @since 1.4
*/
String getLoggerName();
/**
* Returns the sequence number for this {@code LogEntry} object.
*
* A unique, non-negative value that is larger than all previously assigned
* values since the log implementation was started. These values are
* transient and are reused upon restart of the log implementation.
*
* @return The sequence number for this {@code LogEntry} object.
* @since 1.4
*/
long getSequence();
/**
* Returns a string representing the thread which created this
* {@code LogEntry} object.
*
* This string must contain the name of the thread and may contain other
* information about the thread.
*
* @return A string representing the thread which created this
* {@code LogEntry} object.
* @since 1.4
*/
String getThreadInfo();
/**
* Returns the location information of the creation of this {@code LogEntry}
* object.
*
* @return The location information of the creation of this {@code LogEntry}
* object.
* @since 1.4
*/
StackTraceElement getLocation();
}