org.glassfish.jersey.server.internal.monitoring.MonitoringUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jersey-all Show documentation
Show all versions of jersey-all Show documentation
jersey-all is a rebundled verison of Jersey as one OSGi bundle.
The newest version!
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013-2015 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 compliance 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 designates 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 decision 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 org.glassfish.jersey.server.internal.monitoring;
import org.glassfish.jersey.server.model.Resource;
import org.glassfish.jersey.server.model.ResourceMethod;
import org.glassfish.jersey.server.monitoring.ExecutionStatistics;
import org.glassfish.jersey.server.monitoring.TimeWindowStatistics;
/**
* Monitoring helper class that contains utility methods used in
* Monitoring.
*
* @author Miroslav Fuksa
*/
public final class MonitoringUtils {
/**
* Request rate limit (per second) below which statistics can be considered as cacheable.
*/
private static final double CACHEABLE_REQUEST_RATE_LIMIT = 0.001;
/**
* Get the method unique string ID. The ID is constructed from method attributes separated
* by pipe '|'. The attributes are used in the following order:
* method-produces|method-consumes|http-method|method-path|method-java-name
*
* If any of the attributes is not defined, "null" is used for such an attribute.
*
*
* @param method Resource method.
* @return String constructed from resource method parameters.
*/
public static String getMethodUniqueId(final ResourceMethod method) {
final String path = method.getParent() != null ? createPath(method.getParent()) : "null";
return method.getProducedTypes().toString() + "|"
+ method.getConsumedTypes().toString() + "|"
+ method.getHttpMethod() + "|"
+ path + "|"
+ method.getInvocable().getHandlingMethod().getName();
}
private static String createPath(Resource resource) {
return appendPath(resource, new StringBuilder()).toString();
}
private static StringBuilder appendPath(Resource resource, StringBuilder path) {
return resource.getParent() == null ? path.append(resource.getPath())
: appendPath(resource.getParent(), path).append(".").append(resource.getPath());
}
/**
* Indicates whether the global, resource, resource method statistics containing the give execution statistics can
* be cached.
*
* @param stats execution statistics to be examined.
* @return {@code true} if the statistics can be cached, {@code false} otherwise.
*/
static boolean isCacheable(final ExecutionStatistics stats) {
for (final TimeWindowStatistics window : stats.getTimeWindowStatistics().values()) {
if (window.getRequestsPerSecond() >= CACHEABLE_REQUEST_RATE_LIMIT) {
return false;
}
}
return true;
}
/**
* Prevent instantiation.
*/
private MonitoringUtils() {
}
}