improve exception handling

scm-clients/scm-client-impl/src/main/java/sonia/scm/client/ClientUtil.java

@@ -33,6 +33,11 @@
 
 package sonia.scm.client;
 
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 //~--- JDK imports ------------------------------------------------------------
 
 import com.sun.jersey.api.client.Client;
@@ -47,6 +52,67 @@ import com.sun.jersey.api.client.filter.LoggingFilter;
 public class ClientUtil
 {
 
+  /** the logger for ClientUtil */
+  private static final Logger logger =
+    LoggerFactory.getLogger(ClientUtil.class);
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param exception
+   * @param response
+   */
+  public static void appendContent(ScmClientException exception,
+                                   ClientResponse response)
+  {
+    try
+    {
+      exception.setContent(response.getEntity(String.class));
+    }
+    catch (Exception ex)
+    {
+      logger.warn("could not read content", ex);
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   * @param expectedStatusCode
+   */
+  public static void checkResponse(ClientResponse response,
+                                   int expectedStatusCode)
+  {
+    int sc = response.getStatus();
+
+    if (sc != expectedStatusCode)
+    {
+      sendException(response, sc);
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   *
+   */
+  public static void checkResponse(ClientResponse response)
+  {
+    int sc = response.getStatus();
+
+    if (sc >= 300)
+    {
+      sendException(response, sc);
+    }
+  }
+
   /**
    * Method description
    *
@@ -97,4 +163,57 @@ public class ClientUtil
 
     return resource;
   }
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   * @param sc
+   */
+  public static void sendException(ClientResponse response, int sc)
+  {
+    ScmClientException exception = null;
+
+    switch (sc)
+    {
+      case ScmClientException.SC_UNAUTHORIZED :
+        exception = new ScmUnauthorizedException();
+
+        break;
+
+      case ScmClientException.SC_FORBIDDEN :
+        exception = new ScmForbiddenException();
+
+        break;
+
+      case ScmClientException.SC_NOTFOUND :
+        exception = new ScmNotFoundException();
+
+        break;
+
+      default :
+        exception = new ScmClientException(sc);
+        appendContent(exception, response);
+    }
+
+    throw exception;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   *
+   * @return
+   */
+  public static boolean isSuccessfull(ClientResponse response)
+  {
+    int status = response.getStatus();
+
+    return (status > 200) && (status < 300);
+  }
 }

scm-clients/scm-client-impl/src/main/java/sonia/scm/client/JerseyClientProvider.java

@@ -95,12 +95,10 @@ public class JerseyClientProvider implements ScmClientProvider
    *
    * @return
    *
-   * @throws ScmClientException
    */
   @Override
   public JerseyClientSession createSession(String url, String username,
           String password)
-          throws ScmClientException
   {
     AssertUtil.assertIsNotEmpty(url);
 
@@ -153,24 +151,7 @@ public class JerseyClientProvider implements ScmClientProvider
       response = resource.get(ClientResponse.class);
     }
 
-    if (response.getStatus() != 200)
-    {
-      String msg =
-        "server returned ".concat(String.valueOf(response.getStatus()));
-
-      if (logger.isWarnEnabled())
-      {
-        logger.warn(msg);
-      }
-
-      if (logger.isTraceEnabled())
-      {
-        logger.trace("server returned content: {}",
-                     response.getEntity(String.class));
-      }
-
-      throw new ScmClientException(msg);
-    }
+    ClientUtil.checkResponse(response);
 
     ScmState state = response.getEntity(ScmState.class);
 

scm-clients/scm-client-impl/src/main/java/sonia/scm/client/JerseyClientSession.java

@@ -83,10 +83,9 @@ public class JerseyClientSession implements ScmClientSession
    * Method description
    *
    *
-   * @throws IOException
    */
   @Override
-  public void close() throws IOException
+  public void close()
   {
     if (logger.isInfoEnabled())
     {

scm-clients/scm-client-impl/src/main/java/sonia/scm/client/JerseyRepositoryClientHandler.java

@@ -88,26 +88,19 @@ public class JerseyRepositoryClientHandler implements RepositoryClientHandler
     try
     {
       response = resource.post(ClientResponse.class, repository);
+      ClientUtil.checkResponse(response, 201);
 
-      if (response.getStatus() == 201)
-      {
-        String url = response.getHeaders().get("Location").get(0);
+      String url = response.getHeaders().get("Location").get(0);
 
-        AssertUtil.assertIsNotEmpty(url);
+      AssertUtil.assertIsNotEmpty(url);
 
-        Repository newRepository = getRepository(url);
+      Repository newRepository = getRepository(url);
 
-        AssertUtil.assertIsNotNull(newRepository);
-        newRepository.copyProperties(repository);
+      AssertUtil.assertIsNotNull(newRepository);
+      newRepository.copyProperties(repository);
 
-        // copyProperties does not copy the repository id
-        repository.setId(newRepository.getId());
-      }
-      else
-      {
-
-        // todo errorhandling
-      }
+      // copyProperties does not copy the repository id
+      repository.setId(newRepository.getId());
     }
     finally
     {
@@ -132,12 +125,7 @@ public class JerseyRepositoryClientHandler implements RepositoryClientHandler
     try
     {
       response = resource.delete(ClientResponse.class);
-
-      if (response.getStatus() != 204)
-      {
-
-        // todo errorhandling
-      }
+      ClientUtil.checkResponse(response, 204);
     }
     finally
     {
@@ -179,12 +167,7 @@ public class JerseyRepositoryClientHandler implements RepositoryClientHandler
     try
     {
       response = resource.post(ClientResponse.class, repository);
-
-      if (response.getStatus() != 204)
-      {
-
-        // todo errorhandling
-      }
+      ClientUtil.checkResponse(response, 204);
     }
     finally
     {
@@ -224,17 +207,9 @@ public class JerseyRepositoryClientHandler implements RepositoryClientHandler
     try
     {
       response = resource.get(ClientResponse.class);
-
-      if (response.getStatus() == 200)
-      {
-        repositories = response.getEntity(new GenericType<List<Repository>>() {}
-        );
-      }
-      else
-      {
-
-        // todo errorhandling
-      }
+      ClientUtil.checkResponse(response, 200);
+      repositories = response.getEntity(new GenericType<List<Repository>>() {}
+      );
     }
     finally
     {
@@ -274,14 +249,12 @@ public class JerseyRepositoryClientHandler implements RepositoryClientHandler
     {
       response = resource.get(ClientResponse.class);
 
-      if (response.getStatus() == 200)
-      {
-        repository = response.getEntity(Repository.class);
-      }
-      else
-      {
+      int sc = response.getStatus();
 
-        // todo errorhandling
+      if (sc != ScmClientException.SC_NOTFOUND)
+      {
+        ClientUtil.checkResponse(response, 200);
+        repository = response.getEntity(Repository.class);
       }
     }
     finally