com.fitbur.glassfish.jersey.message.internal.TracingInfo Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013-2014 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in com.fitburpliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle com.fitbursignates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your com.fitburcision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.fitbur.glassfish.com.fitbur.message.internal;
import java.util.ArrayList;
import java.util.List;
/**
* Collects tracing messages for a request.
*
* @author Libor Kramolis (libor.kramolis at oracle.com.fitbur)
* @since 2.3
*/
final class TracingInfo {
private final List messageList = new ArrayList();
/**
* Format time duration in millis with accurate to 2 com.fitburcimal places.
*
* @param duration time duration in nanos
* @return Formatted duration in millis.
*/
public static String formatDuration(long duration) {
if (duration == 0) {
return " ----";
} else {
return String.format("%5.2f", (duration / 1000000.0));
}
}
/**
* Format time duration in millis with accurate to 2 com.fitburcimal places.
*
* @param fromTimestamp start of time interval in nanos
* @param toTimestamp end of time interval in nanos
* @return Formatted duration in millis.
*/
public static String formatDuration(long fromTimestamp, long toTimestamp) {
return formatDuration(toTimestamp - fromTimestamp);
}
/**
* Format {@code value} from {@code top} value in percent with accurate to 2 com.fitburcimal places.
*
* @param value part value according to top
* @param top 100% value
* @return Formatted value in percent.
*/
public static String formatPercent(long value, long top) {
if (value == 0) {
return " ----";
} else {
return String.format("%6.2f", 100.0 * value / top);
}
}
/**
* Returns all collected messages enhanced by time duration data.
*
* @return all formatted messages
*/
public String[] getMessages() {
// Format: EventCategory [duration / sinceRequestTime | duration/requestTime % ]
// e.g.: RI [ 3.88 / 8.93 ms | 1.37 %] message text
final long fromTimestamp = messageList.get(0).getTimestamp() - messageList.get(0).getDuration();
final long toTimestamp = messageList.get(messageList.size() - 1).getTimestamp();
final String[] messages = new String[messageList.size()];
for (int i = 0; i < messages.length; i++) {
final Message message = messageList.get(i);
final StringBuilder textSB = new StringBuilder();
// event
textSB.append(String.format("%-11s ", message.getEvent().category()));
// duration
textSB.append('[').
append(formatDuration(message.getDuration())).
append(" / ").
append(formatDuration(fromTimestamp, message.getTimestamp())).
append(" ms |").
append(formatPercent(message.getDuration(), toTimestamp - fromTimestamp)).
append(" %] ");
// text
textSB.append(message.toString());
messages[i] = textSB.toString();
}
return messages;
}
/**
* Add other tracing message.
*
* @param message tracing message.
*/
public void addMessage(Message message) {
messageList.add(message);
}
/**
* A trace message.
* It implements message formatting.
*/
public static class Message {
/**
* Event type.
*/
private final TracingLogger.Event event;
/**
* In nanos.
*/
private final long duration;
/**
* In nanos.
*/
private final long timestamp;
/**
* Already formatted text.
*/
private final String text;
/**
* Create a new trace message.
*
* @param event trace event.
* @param duration event duration.
* @param args message arguments.
*/
public Message(final TracingLogger.Event event, final long duration, final String[] args) {
this.event = event;
this.duration = duration;
this.timestamp = System.nanoTime();
if (event.messageFormat() != null) {
this.text = String.format(event.messageFormat(), (Object[]) args);
} else {
StringBuilder textSB = new StringBuilder();
for (String arg : args) {
textSB.append(arg).append(' ');
}
this.text = textSB.toString();
}
}
private TracingLogger.Event getEvent() {
return event;
}
private long getDuration() {
return duration;
}
private long getTimestamp() {
return timestamp;
}
@Override
public String toString() {
return text;
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy