Use Guice to setup the FileTypeRegistery singleton

This avoids the static singleton.

Signed-off-by: Shawn O. Pearce <sop@google.com>

src/main/java/com/google/gerrit/server/CatServlet.java

@@ -47,8 +47,6 @@ import java.security.SecureRandom;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
-import javax.servlet.ServletConfig;
-import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -68,18 +66,13 @@ public class CatServlet extends HttpServlet {
   private static final MimeType ZIP = new MimeType("application/zip");
   private final GerritServer server;
   private final SecureRandom rng;
-  private FileTypeRegistry registry;
+  private final FileTypeRegistry registry;
 
   @Inject
-  CatServlet(final GerritServer gs) {
+  CatServlet(final GerritServer gs, final FileTypeRegistry ftr) {
     server = gs;
     rng = new SecureRandom();
-  }
-
-  @Override
-  public void init(final ServletConfig config) throws ServletException {
-    super.init(config);
-    registry = FileTypeRegistry.getInstance();
+    registry = ftr;
   }
 
   @Override

src/main/java/com/google/gerrit/server/FileTypeRegistry.java

@@ -14,8 +14,8 @@
 
 package com.google.gerrit.server;
 
-import com.google.gwtjsonrpc.server.XsrfException;
-import com.google.gwtorm.client.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 import eu.medsea.mimeutil.MimeException;
 import eu.medsea.mimeutil.MimeType;
@@ -35,21 +35,19 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
+@Singleton
 public class FileTypeRegistry {
   private static final String KEY_SAFE = "safe";
   private static final String SECTION_MIMETYPE = "mimetype";
   private static final Logger log =
       LoggerFactory.getLogger(FileTypeRegistry.class);
-  private static final FileTypeRegistry INSTANCE = new FileTypeRegistry();
-
-  /** Get the global registry. */
-  public static FileTypeRegistry getInstance() {
-    return INSTANCE;
-  }
 
+  private final GerritServer server;
   private MimeUtil2 mimeUtil;
 
-  private FileTypeRegistry() {
+  @Inject
+  FileTypeRegistry(final GerritServer gs) {
+    server = gs;
     mimeUtil = new MimeUtil2();
     register("eu.medsea.mimeutil.detector.ExtensionMimeDetector");
     register("eu.medsea.mimeutil.detector.MagicMimeMimeDetector");
@@ -133,34 +131,16 @@ public class FileTypeRegistry {
       return false;
     }
 
-    final RepositoryConfig cfg = getGerritConfig();
-    if (cfg != null) {
-      final boolean any = isSafe(cfg, "*/*", false);
-      final boolean genericMedia = isSafe(cfg, type.getMediaType() + "/*", any);
-      return isSafe(cfg, type.toString(), genericMedia);
-    }
-
-    // Assume we cannot send the content inline.
-    //
-    return false;
+    final RepositoryConfig cfg = server.getGerritConfig();
+    final boolean any = isSafe(cfg, "*/*", false);
+    final boolean genericMedia = isSafe(cfg, type.getMediaType() + "/*", any);
+    return isSafe(cfg, type.toString(), genericMedia);
   }
 
   private static boolean isSafe(RepositoryConfig cfg, String type, boolean def) {
     return cfg.getBoolean(SECTION_MIMETYPE, type, KEY_SAFE, def);
   }
 
-  private static RepositoryConfig getGerritConfig() {
-    try {
-      return GerritServer.getInstance().getGerritConfig();
-    } catch (OrmException e) {
-      log.warn("Cannot obtain GerritServer", e);
-      return null;
-    } catch (XsrfException e) {
-      log.warn("Cannot obtain GerritServer", e);
-      return null;
-    }
-  }
-
   private static boolean isUnknownType(Collection<MimeType> mimeTypes) {
     if (mimeTypes.isEmpty()) {
       return true;

src/main/java/com/google/gerrit/server/GerritServletConfig.java

@@ -90,6 +90,7 @@ public class GerritServletConfig extends GuiceServletContextListener {
           bind(GerritServer.class).toInstance(gs);
           bind(ContactStore.class).toInstance(EncryptedContactStore.create(gs));
           bind(OpenIdServiceImpl.class).toInstance(new OpenIdServiceImpl(gs));
+          bind(FileTypeRegistry.class).toInstance(new FileTypeRegistry(gs));
         } catch (OrmException e) {
           addError(e);
         } catch (XsrfException e) {

src/main/java/com/google/gerrit/server/patch/PatchDetailServiceImpl.java

@@ -40,6 +40,7 @@ import com.google.gerrit.client.rpc.NoSuchAccountException;
 import com.google.gerrit.client.rpc.NoSuchEntityException;
 import com.google.gerrit.server.BaseServiceImplementation;
 import com.google.gerrit.server.ChangeUtil;
+import com.google.gerrit.server.FileTypeRegistry;
 import com.google.gerrit.server.GerritJsonServlet;
 import com.google.gerrit.server.GerritServer;
 import com.google.gerrit.server.mail.AbandonedSender;
@@ -65,9 +66,11 @@ import java.util.Set;
 class PatchDetailServiceImpl extends BaseServiceImplementation implements
     PatchDetailService {
   private final Logger log = LoggerFactory.getLogger(getClass());
+  private final FileTypeRegistry registry;
 
-  PatchDetailServiceImpl(final GerritServer gs) {
+  PatchDetailServiceImpl(final GerritServer gs, final FileTypeRegistry ftr) {
     super(gs);
+    registry = ftr;
   }
 
   public void patchScript(final Patch.Key patchKey, final PatchSet.Id psa,
@@ -77,7 +80,8 @@ class PatchDetailServiceImpl extends BaseServiceImplementation implements
       callback.onFailure(new NoSuchEntityException());
       return;
     }
-    run(callback, new PatchScriptAction(server, patchKey, psa, psb, s));
+    run(callback,
+        new PatchScriptAction(server, registry, patchKey, psa, psb, s));
   }
 
   public void patchComments(final Patch.Key patchKey, final PatchSet.Id psa,
@@ -109,7 +113,8 @@ class PatchDetailServiceImpl extends BaseServiceImplementation implements
         if (comment.getKey().get() == null) {
           final PatchLineComment nc =
               new PatchLineComment(new PatchLineComment.Key(patch.getKey(),
-                  ChangeUtil.messageUUID(db)), comment.getLine(), me, comment.getParentUuid());
+                  ChangeUtil.messageUUID(db)), comment.getLine(), me, comment
+                  .getParentUuid());
           nc.setSide(comment.getSide());
           nc.setMessage(comment.getMessage());
           db.patchComments().insert(Collections.singleton(nc));
@@ -183,16 +188,17 @@ class PatchDetailServiceImpl extends BaseServiceImplementation implements
   /**
    * Update the reviewed status for the file by user @code{account}
    */
-  public void setReviewedByCurrentUser(final Key patchKey, final boolean reviewed,
-      AsyncCallback<VoidResult> callback) {
+  public void setReviewedByCurrentUser(final Key patchKey,
+      final boolean reviewed, AsyncCallback<VoidResult> callback) {
     run(callback, new Action<VoidResult>() {
       public VoidResult run(ReviewDb db) throws OrmException {
         Account.Id account = Common.getAccountId();
-        AccountPatchReview.Key key = new AccountPatchReview.Key(patchKey, account);
+        AccountPatchReview.Key key =
+            new AccountPatchReview.Key(patchKey, account);
         AccountPatchReview apr = db.accountPatchReviews().get(key);
         if (apr == null && reviewed) {
-          db.accountPatchReviews().
-              insert(Collections.singleton(new AccountPatchReview(patchKey, account)));
+          db.accountPatchReviews().insert(
+              Collections.singleton(new AccountPatchReview(patchKey, account)));
         } else if (apr != null && !reviewed) {
           db.accountPatchReviews().delete(Collections.singleton(apr));
         }

src/main/java/com/google/gerrit/server/patch/PatchDetailServiceSrv.java

@@ -14,6 +14,7 @@
 
 package com.google.gerrit.server.patch;
 
+import com.google.gerrit.server.FileTypeRegistry;
 import com.google.gerrit.server.GerritJsonServlet;
 import com.google.gerrit.server.GerritServer;
 import com.google.inject.Inject;
@@ -23,13 +24,16 @@ import com.google.inject.Singleton;
 @SuppressWarnings("serial")
 @Singleton
 public class PatchDetailServiceSrv extends GerritJsonServlet {
+  private final FileTypeRegistry registry;
+
   @Inject
-  PatchDetailServiceSrv(final GerritServer gs) {
+  PatchDetailServiceSrv(final GerritServer gs, final FileTypeRegistry ftr) {
     super(gs);
+    registry = ftr;
   }
 
   @Override
   protected Object createServiceHandle() throws Exception {
-    return new PatchDetailServiceImpl(server);
+    return new PatchDetailServiceImpl(server, registry);
   }
 }

src/main/java/com/google/gerrit/server/patch/PatchScriptAction.java

@@ -31,6 +31,7 @@ import com.google.gerrit.client.reviewdb.ReviewDb;
 import com.google.gerrit.client.rpc.Common;
 import com.google.gerrit.client.rpc.CorruptEntityException;
 import com.google.gerrit.client.rpc.NoSuchEntityException;
+import com.google.gerrit.server.FileTypeRegistry;
 import com.google.gerrit.server.GerritServer;
 import com.google.gerrit.server.BaseServiceImplementation.Action;
 import com.google.gerrit.server.BaseServiceImplementation.Failure;
@@ -56,6 +57,7 @@ class PatchScriptAction implements Action<PatchScript> {
       LoggerFactory.getLogger(PatchScriptAction.class);
 
   private final GerritServer server;
+  private final FileTypeRegistry registry;
   private final Patch.Key patchKey;
   private final PatchSet.Id psa;
   private final PatchSet.Id psb;
@@ -69,10 +71,11 @@ class PatchScriptAction implements Action<PatchScript> {
   private Project.NameKey projectKey;
   private Repository git;
 
-  PatchScriptAction(final GerritServer gs, final Patch.Key patchKey,
-      final PatchSet.Id psa, final PatchSet.Id psb,
+  PatchScriptAction(final GerritServer gs, final FileTypeRegistry ftr,
+      final Patch.Key patchKey, final PatchSet.Id psa, final PatchSet.Id psb,
       final PatchScriptSettings settings) {
     this.server = gs;
+    this.registry = ftr;
     this.patchKey = patchKey;
     this.psa = psa;
     this.psb = psb;
@@ -167,7 +170,7 @@ class PatchScriptAction implements Action<PatchScript> {
     else
       throw new Failure(new NoSuchEntityException());
 
-    final PatchScriptBuilder b = new PatchScriptBuilder();
+    final PatchScriptBuilder b = new PatchScriptBuilder(registry);
     b.setRepository(git);
     b.setPatch(patch);
     b.setSettings(s);

src/main/java/com/google/gerrit/server/patch/PatchScriptBuilder.java

@@ -78,11 +78,11 @@ class PatchScriptBuilder {
   private List<Edit> edits;
   private final FileTypeRegistry registry;
 
-  PatchScriptBuilder() {
+  PatchScriptBuilder(final FileTypeRegistry ftr) {
     header = new ArrayList<String>();
     a = new Side();
     b = new Side();
-    registry = FileTypeRegistry.getInstance();
+    registry = ftr;
   }
 
   void setRepository(final Repository r) {