added webservice

scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginResource.java

@@ -0,0 +1,204 @@
+/**
+ * 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.rest;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Inject;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.plugin.BackendConfiguration;
+import sonia.scm.plugin.PluginBackend;
+import sonia.scm.plugin.PluginCenter;
+import sonia.scm.plugin.PluginInformation;
+import sonia.scm.plugin.PluginVersion;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import javax.ws.rs.DefaultValue;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Path("{version}/plugins")
+public class PluginResource
+{
+
+  /** the logger for PluginResource */
+  private static final Logger logger =
+    LoggerFactory.getLogger(PluginResource.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param backend
+   * @param configuration
+   */
+  @Inject
+  public PluginResource(PluginBackend backend,
+                        BackendConfiguration configuration)
+  {
+    this.backend = backend;
+    this.configuration = configuration;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param version
+   * @param snapshot
+   *
+   * @return
+   */
+  @GET
+  @Produces(MediaType.APPLICATION_XML)
+  public Response getPlugins(
+         @PathParam("version") String version,
+         @DefaultValue("false") @QueryParam("snapshot") boolean snapshot)
+  {
+    if (logger.isDebugEnabled())
+    {
+      logger.debug("load plugins for version {}, include snapshots: {}",
+                   version, Boolean.toString(snapshot));
+    }
+
+    List<PluginInformation> plugins =
+      backend.getPlugins(new DefaultPluginFilter(version, null, null,
+        snapshot));
+    PluginCenter pc = new PluginCenter();
+
+    pc.setPlugins(getNewestPlugins(plugins));
+    pc.setRepositories(configuration.getRepositories());
+
+    return Response.ok(pc).build();
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugins
+   *
+   * @return
+   */
+  private Set<PluginInformation> getNewestPlugins(
+          List<PluginInformation> plugins)
+  {
+    Collections.sort(plugins, PluginInformationComparator.INSTANCE);
+
+    Set<PluginInformation> pluginSet = new HashSet<PluginInformation>();
+    PluginInformation newest = null;
+
+    for (PluginInformation plugin : plugins)
+    {
+      if (newest == null)
+      {
+        newest = plugin;
+      }
+      else if (isSamePlugin(plugin, newest))
+      {
+        if (isNewer(plugin, newest))
+        {
+          newest = plugin;
+        }
+      }
+      else
+      {
+        pluginSet.add(newest);
+        newest = plugin;
+      }
+    }
+
+    return pluginSet;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugin
+   * @param newest
+   *
+   * @return
+   */
+  private boolean isNewer(PluginInformation plugin, PluginInformation newest)
+  {
+    return new PluginVersion(plugin.getVersion()).isNewer(newest.getVersion());
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugin
+   * @param otherPlugin
+   *
+   * @return
+   */
+  private boolean isSamePlugin(PluginInformation plugin,
+                               PluginInformation otherPlugin)
+  {
+    return plugin.getGroupId().equals(otherPlugin.getGroupId())
+           && plugin.getArtifactId().equals(otherPlugin.getArtifactId());
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private PluginBackend backend;
+
+  /** Field description */
+  private BackendConfiguration configuration;
+}