SONAR-2106: New Java library to bootstrap project analysis

* Add BatchResourcesServlet to allow downloading libraries from server

* Create in memory POM for non-maven environments

* Provide fake MavenPluginExecutor for non-maven environments

* Add new module sonar-batch-maven-compat with shaded maven-project

3 files changed, 172 insertions, 1 deletions

diff --git a/sonar-server/src/main/java/org/sonar/server/plugins/BatchResourcesServlet.java b/sonar-server/src/main/java/org/sonar/server/plugins/BatchResourcesServlet.java
new file mode 100644
index 00000000000..1e8ab666578
--- /dev/null
+++ b/sonar-server/src/main/java/org/sonar/server/plugins/BatchResourcesServlet.java
@@ -0,0 +1,104 @@
+/*
+ * Sonar, open source software quality management tool.
+ * Copyright (C) 2009 SonarSource SA
+ * mailto:contact AT sonarsource DOT com
+ *
+ * Sonar is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * Sonar is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Sonar; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
+ */
+package org.sonar.server.plugins;
+
+import com.google.common.collect.Lists;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.util.List;
+import java.util.Set;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * This servlet allows to load libraries from directory "WEB-INF/lib" in order to provide them for batch-bootstrapper.
+ * Most probably this is not a best solution.
+ */
+public class BatchResourcesServlet extends HttpServlet {
+
+  private static final Logger LOG = LoggerFactory.getLogger(BatchResourcesServlet.class);
+
+  @Override
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+    String resource = getResource(request);
+    if (StringUtils.isEmpty(resource)) {
+      PrintWriter writer = null;
+      try {
+        String libs = StringUtils.join(getLibs(), ",");
+        response.setContentType("text/html");
+        writer = response.getWriter();
+        writer.println(libs);
+      } catch (IOException e) {
+        LOG.error("Unable to provide list of batch resources", e);
+        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+      } finally {
+        IOUtils.closeQuietly(writer);
+      }
+    } else {
+      InputStream in = null;
+      OutputStream out = null;
+      try {
+        in = getServletContext().getResourceAsStream("/WEB-INF/lib/" + resource);
+        if (in == null) {
+          // TODO
+        } else {
+          out = response.getOutputStream();
+          IOUtils.copy(in, out);
+        }
+      } catch (Exception e) {
+        LOG.error("Unable to load batch resource '" + resource + "'", e);
+        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+      } finally {
+        IOUtils.closeQuietly(in);
+        IOUtils.closeQuietly(out);
+      }
+    }
+  }
+
+  List<String> getLibs() {
+    List<String> libs = Lists.newArrayList();
+    Set paths = getServletContext().getResourcePaths("/WEB-INF/lib");
+    for (Object obj : paths) {
+      String path = (String) obj;
+      if (StringUtils.endsWith(path, ".jar")) {
+        libs.add(StringUtils.removeStart(path, "/WEB-INF/lib/"));
+      }
+    }
+    return libs;
+  }
+
+  /**
+   * @return part of request URL after servlet path
+   */
+  String getResource(HttpServletRequest request) {
+    return StringUtils.substringAfter(request.getRequestURI(), request.getContextPath() + request.getServletPath() + "/");
+  }
+
+}
diff --git a/sonar-server/src/main/webapp/WEB-INF/web.xml b/sonar-server/src/main/webapp/WEB-INF/web.xml
index 99d68dcc5f6..25869629487 100644
--- a/sonar-server/src/main/webapp/WEB-INF/web.xml
+++ b/sonar-server/src/main/webapp/WEB-INF/web.xml
@@ -78,6 +78,10 @@
     <servlet-name>static</servlet-name>
     <servlet-class>org.sonar.server.plugins.StaticResourcesServlet</servlet-class>
   </servlet>
+  <servlet>
+    <servlet-name>batch</servlet-name>
+    <servlet-class>org.sonar.server.plugins.BatchResourcesServlet</servlet-class>
+  </servlet>
 
   <servlet-mapping>
     <servlet-name>chart</servlet-name>
@@ -91,6 +95,10 @@
     <servlet-name>static</servlet-name>
     <url-pattern>/static/*</url-pattern>
   </servlet-mapping>
+  <servlet-mapping>
+    <servlet-name>batch</servlet-name>
+    <url-pattern>/batch/*</url-pattern>
+  </servlet-mapping>
 
   <listener>
     <listener-class>org.sonar.server.platform.PlatformLifecycleListener</listener-class>
@@ -103,4 +111,4 @@
     <session-timeout>30</session-timeout>
   </session-config>
 
-</web-app>
\ No newline at end of file
+</web-app>
diff --git a/sonar-server/src/test/java/org/sonar/server/plugins/BatchResourcesServletTest.java b/sonar-server/src/test/java/org/sonar/server/plugins/BatchResourcesServletTest.java
new file mode 100644
index 00000000000..3dadef9567f
--- /dev/null
+++ b/sonar-server/src/test/java/org/sonar/server/plugins/BatchResourcesServletTest.java
@@ -0,0 +1,59 @@
+package org.sonar.server.plugins;
+
+import com.google.common.collect.Sets;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Set;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+public class BatchResourcesServletTest {
+  private BatchResourcesServlet servlet;
+  private HttpServletRequest request;
+
+  @Before
+  public void setUp() throws Exception {
+    servlet = new BatchResourcesServlet();
+    request = mock(HttpServletRequest.class);
+  }
+
+  @Test
+  public void shouldDetermineResource() {
+    when(request.getContextPath()).thenReturn("sonar");
+    when(request.getServletPath()).thenReturn("/batch");
+
+    when(request.getRequestURI()).thenReturn("/sonar/batch/sonar-core-2.6.jar");
+    assertThat(servlet.getResource(request), is("sonar-core-2.6.jar"));
+
+    when(request.getRequestURI()).thenReturn("/sonar/batch/");
+    assertThat(servlet.getResource(request), is(""));
+
+    when(request.getRequestURI()).thenReturn("/sonar/batch");
+    assertThat(servlet.getResource(request), is(""));
+  }
+
+  @Test
+  public void shouldDetermineListOfResources() {
+    ServletContext servletContext = mock(ServletContext.class);
+    servlet = spy(servlet);
+    doReturn(servletContext).when(servlet).getServletContext();
+    Set<String> libs = Sets.newHashSet();
+    libs.add("/WEB-INF/lib/sonar-core-2.6.jar");
+    libs.add("/WEB-INF/lib/treemap.rb");
+    libs.add("/WEB-INF/lib/directory/");
+    when(servletContext.getResourcePaths(anyString())).thenReturn(libs);
+
+    assertThat(servlet.getLibs().size(), is(1));
+    assertThat(servlet.getLibs().get(0), is("sonar-core-2.6.jar"));
+  }
+}