store plugin informations with jaxb

scm-plugin-backend/src/main/java/sonia/scm/plugin/DefaultPluginBackend.java

@@ -38,6 +38,11 @@ package sonia.scm.plugin;
 import com.google.inject.Inject;
 import com.google.inject.name.Named;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.ConfigurationException;
+
 //~--- JDK imports ------------------------------------------------------------
 
 import java.io.File;
@@ -45,6 +50,9 @@ import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+
 /**
  *
  * @author Sebastian Sdorra
@@ -52,6 +60,18 @@ import java.util.List;
 public class DefaultPluginBackend implements PluginBackend
 {
 
+  /** Field description */
+  public static final String FILE_STORE = "store.xml";
+
+  /** Field description */
+  private static final Object LOCK_OBJECT = new Object();
+
+  /** the logger for DefaultPluginBackend */
+  private static final Logger logger =
+    LoggerFactory.getLogger(DefaultPluginBackend.class);
+
+  //~--- constructors ---------------------------------------------------------
+
   /**
    * Constructs ...
    *
@@ -64,6 +84,23 @@ public class DefaultPluginBackend implements PluginBackend
           @Named(ScmBackendModule.DIRECTORY_PROPERTY) File baseDirectory)
   {
     this.baseDirectory = baseDirectory;
+    this.storeFile = new File(baseDirectory, FILE_STORE);
+
+    try
+    {
+      storeContext = JAXBContext.newInstance(PluginBackendStore.class);
+
+      if (storeFile.exists())
+      {
+        pluginStore =
+          (PluginBackendStore) storeContext.createUnmarshaller().unmarshal(
+            storeFile);
+      }
+    }
+    catch (JAXBException ex)
+    {
+      throw new ConfigurationException(ex);
+    }
   }
 
   //~--- methods --------------------------------------------------------------
@@ -77,7 +114,14 @@ public class DefaultPluginBackend implements PluginBackend
   @Override
   public void addPlugin(PluginInformation plugin)
   {
-    plugins.add(plugin);
+    if (!pluginStore.contains(plugin))
+    {
+      synchronized (LOCK_OBJECT)
+      {
+        pluginStore.add(plugin);
+        store();
+      }
+    }
   }
 
   //~--- get methods ----------------------------------------------------------
@@ -103,7 +147,7 @@ public class DefaultPluginBackend implements PluginBackend
   @Override
   public List<PluginInformation> getPlugins()
   {
-    return plugins;
+    return pluginStore.getPlugins();
   }
 
   /**
@@ -120,7 +164,7 @@ public class DefaultPluginBackend implements PluginBackend
     List<PluginInformation> filteredPlugins =
       new ArrayList<PluginInformation>();
 
-    for (PluginInformation plugin : plugins)
+    for (PluginInformation plugin : pluginStore)
     {
       if (filter.accept(plugin))
       {
@@ -131,17 +175,22 @@ public class DefaultPluginBackend implements PluginBackend
     return filteredPlugins;
   }
 
-  //~--- set methods ----------------------------------------------------------
+  //~--- methods --------------------------------------------------------------
 
   /**
    * Method description
    *
-   *
-   * @param plugins
    */
-  public void setPlugins(List<PluginInformation> plugins)
+  private void store()
   {
-    this.plugins = plugins;
+    try
+    {
+      storeContext.createMarshaller().marshal(pluginStore, storeFile);
+    }
+    catch (JAXBException ex)
+    {
+      logger.error("could not store pluginStore", ex);
+    }
   }
 
   //~--- fields ---------------------------------------------------------------
@@ -150,5 +199,11 @@ public class DefaultPluginBackend implements PluginBackend
   private File baseDirectory;
 
   /** Field description */
-  private List<PluginInformation> plugins = new ArrayList<PluginInformation>();
+  private PluginBackendStore pluginStore;
+
+  /** Field description */
+  private JAXBContext storeContext;
+
+  /** Field description */
+  private File storeFile;
 }

scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackendStore.java

@@ -0,0 +1,127 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.plugin;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlElementWrapper;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@XmlAccessorType(XmlAccessType.FIELD)
+@XmlRootElement(name = "plugin-backend")
+public class PluginBackendStore implements Iterable<PluginInformation>
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @param e
+   *
+   * @return
+   */
+  public boolean add(PluginInformation e)
+  {
+    return plugins.add(e);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugin
+   *
+   * @return
+   */
+  public boolean contains(PluginInformation plugin)
+  {
+    return plugins.contains(plugin);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public Iterator<PluginInformation> iterator()
+  {
+    return plugins.iterator();
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public List<PluginInformation> getPlugins()
+  {
+    return plugins;
+  }
+
+  //~--- set methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugins
+   */
+  public void setPlugins(List<PluginInformation> plugins)
+  {
+    this.plugins = plugins;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  @XmlElement(name = "plugin")
+  @XmlElementWrapper(name = "plugins")
+  private List<PluginInformation> plugins = new ArrayList<PluginInformation>();
+}

scm-plugin-backend/src/main/java/sonia/scm/plugin/scanner/PluginScannerTimerTask.java

@@ -35,6 +35,9 @@ package sonia.scm.plugin.scanner;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import sonia.scm.plugin.BackendConfiguration;
 import sonia.scm.plugin.PluginBackend;
 
@@ -51,6 +54,12 @@ import java.util.TimerTask;
 public class PluginScannerTimerTask extends TimerTask
 {
 
+  /** the logger for PluginScannerTimerTask */
+  private static final Logger logger =
+    LoggerFactory.getLogger(PluginScannerTimerTask.class);
+
+  //~--- constructors ---------------------------------------------------------
+
   /**
    * Constructs ...
    *
@@ -76,6 +85,11 @@ public class PluginScannerTimerTask extends TimerTask
   @Override
   public void run()
   {
+    if (logger.isInfoEnabled())
+    {
+      logger.info("start scann");
+    }
+
     for (File directory : configuration.getDirectories())
     {
       PluginScanner scanner = scannerFactory.createScanner();

scm-plugin-backend/src/main/webapp/META-INF/context.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Context antiJARLocking="true" path="/scm-plugin-backend"/>