1 files changed, 84 insertions, 0 deletions
diff --git a/java/com/google/gerrit/httpd/GuiceRequestScopePropagator.java b/java/com/google/gerrit/httpd/GuiceRequestScopePropagator.java
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+++ b/java/com/google/gerrit/httpd/GuiceRequestScopePropagator.java
@@ -0,0 +1,84 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.httpd;
+
+import com.google.gerrit.common.Nullable;
+import com.google.gerrit.server.RemotePeer;
+import com.google.gerrit.server.config.CanonicalWebUrl;
+import com.google.gerrit.server.util.RequestScopePropagator;
+import com.google.gerrit.server.util.ThreadLocalRequestContext;
+import com.google.inject.Inject;
+import com.google.inject.Key;
+import com.google.inject.Provider;
+import com.google.inject.servlet.ServletScopes;
+import com.google.inject.util.Providers;
+import com.google.inject.util.Types;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.net.SocketAddress;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import javax.servlet.http.HttpServletRequest;
+
+/** Propagator for Guice's built-in servlet scope. */
+public class GuiceRequestScopePropagator extends RequestScopePropagator {
+
+  private final String url;
+  private final SocketAddress peer;
+  private final Provider<HttpServletRequest> request;
+
+  @Inject
+  GuiceRequestScopePropagator(
+      @CanonicalWebUrl @Nullable Provider<String> urlProvider,
+      @RemotePeer Provider<SocketAddress> remotePeerProvider,
+      ThreadLocalRequestContext local,
+      Provider<HttpServletRequest> request) {
+    super(ServletScopes.REQUEST, local);
+    this.url = urlProvider != null ? urlProvider.get() : null;
+    this.peer = remotePeerProvider.get();
+    this.request = request;
+  }
+
+  /** @see RequestScopePropagator#wrap(Callable) */
+  // ServletScopes#continueRequest is deprecated, but it's not obvious their
+  // recommended replacement is an appropriate drop-in solution; see
+  // https://gerrit-review.googlesource.com/83971
+  @SuppressWarnings("deprecation")
+  @Override
+  protected <T> Callable<T> wrapImpl(Callable<T> callable) {
+    Map<Key<?>, Object> seedMap = new HashMap<>();
+
+    // Request scopes appear to use specific keys in their map, instead of only
+    // providers. Add bindings for both the key to the instance directly and the
+    // provider to the instance to be safe.
+    seedMap.put(Key.get(typeOfProvider(String.class), CanonicalWebUrl.class), Providers.of(url));
+    seedMap.put(Key.get(String.class, CanonicalWebUrl.class), url);
+
+    seedMap.put(Key.get(typeOfProvider(SocketAddress.class), RemotePeer.class), Providers.of(peer));
+    seedMap.put(Key.get(SocketAddress.class, RemotePeer.class), peer);
+
+    Key<?> webSessionAttrKey = Key.get(WebSession.class);
+    Object webSessionAttrValue = request.get().getAttribute(webSessionAttrKey.toString());
+    seedMap.put(webSessionAttrKey, webSessionAttrValue);
+    seedMap.put(Key.get(typeOfProvider(WebSession.class)), Providers.of(webSessionAttrValue));
+
+    return ServletScopes.continueRequest(callable, seedMap);
+  }
+
+  private ParameterizedType typeOfProvider(Type type) {
+    return Types.newParameterizedType(Provider.class, type);
+  }
+}