BasicKernelDeployer


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8   * under the terms of the GNU Lesser General Public License as
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10  * the License, or (at your option) any later version.
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13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
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17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
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20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22  package org.jboss.kernel.plugins.deployment;
23  
24  import java.util.List  ;
25  import java.util.ListIterator  ;
26  
27  import org.jboss.kernel.Kernel;
28  import org.jboss.kernel.spi.deployment.KernelDeployment;
29  import org.jboss.logging.Logger;
30  import org.jboss.util.collection.CollectionsFactory;
31  
32  /**
33   * BasicKernelDeployer.<p>
34   * 
35   * An extension to the abstract kernel deployer that keeps track
36   * of deployments and adds a simple shutdown method.
37   * 
38   * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
39   * @version $Revision: 45764 $
40   */
41  public class BasicKernelDeployer extends AbstractKernelDeployer
42  {
43     /** The log */
44     private static final Logger log = Logger.getLogger(BasicKernelDeployer.class);
45  
46     /** The deployments */
47     protected List  <KernelDeployment> deployments = CollectionsFactory.createCopyOnWriteList();
48  
49     /**
50      * Create a new BasicKernelDeployer.
51      * 
52      * @param kernel the kernel
53      */
54     public BasicKernelDeployer(Kernel kernel)
55     {
56        super(kernel);
57     }
58  
59     public void deploy(KernelDeployment deployment) throws Throwable  
60     {
61        final boolean trace = log.isTraceEnabled();
62        if (trace)
63           log.trace("Deploying " + deployment);
64        super.deploy(deployment);
65        deployments.add(deployment);
66        if (trace)
67           log.trace("Deployed " + deployment);
68     }
69  
70     public void undeploy(KernelDeployment deployment)
71     {
72        final boolean trace = log.isTraceEnabled();
73        if (trace)
74           log.trace("Undeploying " + deployment);
75        deployments.remove(deployment);
76        super.undeploy(deployment);
77        if (trace)
78           log.trace("Undeployed " + deployment);
79     }
80  
81     /**
82      * Shutdown the deployer (undeploys everything)
83      */
84     public void shutdown()
85     {
86        ListIterator   iterator = deployments.listIterator(deployments.size());
87        while (iterator.hasPrevious())
88        {
89           KernelDeployment deployment = (KernelDeployment) iterator.previous();
90           undeploy(deployment);
91        }
92     }
93  }
94
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