On Oct 27, 2009, at 10:37 PM, Jeanfrancois Arcand wrote:
> Salut,
>
> Raist wrote:
>> Hi all,
>> I have little problem, and i can't find a solution.
>> I need to add new root resources to instance of Grizzly server
>> (without restart). Is this possible?
>
> Can you cut&paste how you embed/start Grizzly? Technically it should
> be doable as it just consist of adding a new instance of
> ServletAdapter. But do you need to keep the previously "deployed"
> root resources alive?
>
Jersey has a ContainerNotifier and ContainerListener that can perform
reload. At the end of the email are two unit tests that use the low-
level and servlet Grizzly support using Jersey's ContainerNotifier and
ContainerListener. Hopefully that should give a good indication on how
to use it.
A reload will cause Jersey to destroy all previous state and then
reload. Any singletons you have configured will have their @PreDestroy
method called. No client connections will be lost and requests being
served when a reload occurs will use the previous state.
It is currently not possible to dynamically add/remove root resource
and provider classes without a complete reload.
Paul.
/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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
https://jersey.dev.java.net/CDDL+GPL.html
* or jersey/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 jersey/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath"
exception
* as provided by Sun in the GPL Version 2 section of the License
file that
* accompanied this code. If applicable, add the following below the
License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [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 com.sun.jersey.impl.container.grizzly;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import javax.ws.rs.Path;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.core.DefaultResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.spi.container.ContainerListener;
import com.sun.jersey.spi.container.ContainerNotifier;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.GET;
import junit.framework.*;
/**
*
* @author Paul.Sandoz_at_Sun.Com
*/
public class ReloadTest extends AbstractGrizzlyServerTester {
@Path("/one")
public static class One {
@GET
public String get() {
return "one";
}
}
@Path("/two")
public static class Two {
@GET
public String get() {
return "two";
}
}
private static class Reloader implements ContainerNotifier {
List<ContainerListener> ls;
public Reloader() {
ls = new ArrayList<ContainerListener>();
}
public void addListener(ContainerListener l) {
ls.add(l);
}
public void reload() {
for (ContainerListener l : ls) {
l.onReload();
}
}
}
public ReloadTest(String testName) {
super(testName);
}
public void testReload() {
ResourceConfig rc = new DefaultResourceConfig(One.class);
Reloader cr = new Reloader();
rc.getProperties().put(ResourceConfig.PROPERTY_CONTAINER_NOTIFIER, cr);
startServer(rc);
assertEquals(1, cr.ls.size());
WebResource r =
Client.create().resource(getUri().path("/").build());
assertEquals("one", r.path("one").get(String.class));
assertEquals(404,
r.path("two").get(ClientResponse.class).getStatus());
rc.getClasses().add(Two.class);
cr.reload();
assertEquals("one", r.path("one").get(String.class));
assertEquals("two", r.path("two").get(String.class));
}
}
/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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
https://jersey.dev.java.net/CDDL+GPL.html
* or jersey/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 jersey/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath"
exception
* as provided by Sun in the GPL Version 2 section of the License
file that
* accompanied this code. If applicable, add the following below the
License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [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 com.sun.jersey.impl.container.grizzly.web;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import javax.ws.rs.Path;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.spi.container.ContainerListener;
import com.sun.jersey.spi.container.ContainerNotifier;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.GET;
/**
*
* @author Paul.Sandoz_at_Sun.Com
*/
public class ReloadTest extends AbstractGrizzlyWebContainerTester {
@Path("/one")
public static class One {
@GET
public String get() {
return "one";
}
}
@Path("/two")
public static class Two {
@GET
public String get() {
return "two";
}
}
private static class Reloader implements ContainerNotifier {
List<ContainerListener> ls;
public Reloader() {
ls = new ArrayList<ContainerListener>();
}
public void addListener(ContainerListener l) {
ls.add(l);
}
public void reload() {
for (ContainerListener l : ls) {
l.onReload();
}
}
}
public static class ReloadServletContainer extends
ServletContainer {
ResourceConfig rc;
Reloader cr;
int i = 0;
@Override
public void service(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, IOException {
i++;
super.service(req, resp);
if (i == 2) {
rc.getClasses().add(Two.class);
cr.reload();
}
}
@Override
protected void configure(final ServletConfig sc,
ResourceConfig rc, WebApplication wa) {
super.configure(sc, rc, wa);
this.rc = rc;
cr = new Reloader();
rc.getProperties().put(ResourceConfig.PROPERTY_CONTAINER_NOTIFIER, cr);
}
}
public ReloadTest(String testName) {
super(testName);
}
public void testReload() {
setServletClass(ReloadServletContainer.class);
startServer(One.class);
WebResource r =
Client.create().resource(getUri().path("/").build());
assertEquals("one", r.path("one").get(String.class));
assertEquals(404,
r.path("two").get(ClientResponse.class).getStatus());
assertEquals("one", r.path("one").get(String.class));
assertEquals("two", r.path("two").get(String.class));
}
}