added sonia-graph-plugin

plugins/scm-graph-plugin/src/main/java/sonia/scm/graph/GraphServlet.java

@@ -0,0 +1,183 @@
+/**
+ * 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.graph;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Guice;
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import com.google.inject.grapher.GrapherModule;
+import com.google.inject.grapher.InjectorGrapher;
+import com.google.inject.grapher.graphviz.GraphvizModule;
+import com.google.inject.grapher.graphviz.GraphvizRenderer;
+
+import sonia.scm.util.IOUtil;
+import sonia.scm.util.SecurityUtil;
+import sonia.scm.web.security.WebSecurityContext;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Singleton
+public class GraphServlet extends HttpServlet
+{
+
+  /** Field description */
+  public static final String CONTENT_TYPE = "application/octet-stream";
+
+  /** Field description */
+  private static final long serialVersionUID = 2733077353390468391L;
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   *
+   * @param securityContextProvider
+   * @param injector
+   */
+  @Inject
+  public GraphServlet(Provider<WebSecurityContext> securityContextProvider,
+                      Injector injector)
+  {
+    this.securityContextProvider = securityContextProvider;
+    this.injector = injector;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  @Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response)
+          throws ServletException, IOException
+  {
+    processRequest(response);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  @Override
+  protected void doPost(HttpServletRequest request,
+                        HttpServletResponse response)
+          throws ServletException, IOException
+  {
+    processRequest(response);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  private void processRequest(HttpServletResponse response)
+          throws ServletException, IOException
+  {
+    SecurityUtil.assertIsAdmin(securityContextProvider);
+
+    PrintWriter writer = null;
+    PrintWriter bufferWriter = null;
+
+    try
+    {
+      response.setContentType(CONTENT_TYPE);
+
+      Injector grapherInjector = Guice.createInjector(new GrapherModule(),
+                                   new GraphvizModule());
+      GraphvizRenderer renderer =
+        grapherInjector.getInstance(GraphvizRenderer.class);
+      StringWriter buffer = new StringWriter();
+
+      bufferWriter = new PrintWriter(buffer);
+      renderer.setOut(bufferWriter).setRankdir("TB");
+      grapherInjector.getInstance(InjectorGrapher.class).of(injector).graph();
+      bufferWriter.flush();
+      writer = response.getWriter();
+
+      String graphString = buffer.toString();
+
+      writer.print(graphString.replaceAll("invis", "solid"));
+    }
+    finally
+    {
+      IOUtil.close(writer);
+      IOUtil.close(bufferWriter);
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Injector injector;
+
+  /** Field description */
+  private Provider<WebSecurityContext> securityContextProvider;
+}