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-rw-r--r--java/com/google/gerrit/server/auth/UniversalAuthBackend.java69
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diff --git a/java/com/google/gerrit/server/auth/UniversalAuthBackend.java b/java/com/google/gerrit/server/auth/UniversalAuthBackend.java
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+// 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.server.auth;
+
+import static java.util.Objects.requireNonNull;
+
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.util.ArrayList;
+import java.util.List;
+
+/** Universal implementation of the AuthBackend that works with the injected set of AuthBackends. */
+@Singleton
+public final class UniversalAuthBackend implements AuthBackend {
+ private final DynamicSet<AuthBackend> authBackends;
+
+ @Inject
+ UniversalAuthBackend(DynamicSet<AuthBackend> authBackends) {
+ this.authBackends = authBackends;
+ }
+
+ @Override
+ public AuthUser authenticate(AuthRequest request) throws AuthException {
+ List<AuthUser> authUsers = new ArrayList<>();
+ List<AuthException> authExs = new ArrayList<>();
+ for (AuthBackend backend : authBackends) {
+ try {
+ authUsers.add(requireNonNull(backend.authenticate(request)));
+ } catch (MissingCredentialsException ex) {
+ // Not handled by this backend.
+ } catch (AuthException ex) {
+ authExs.add(ex);
+ }
+ }
+
+ // Handle the valid responses
+ if (authUsers.size() == 1) {
+ return authUsers.get(0);
+ } else if (authUsers.isEmpty() && authExs.size() == 1) {
+ throw authExs.get(0);
+ } else if (authExs.isEmpty() && authUsers.isEmpty()) {
+ throw new MissingCredentialsException();
+ }
+
+ String msg =
+ String.format(
+ "Multiple AuthBackends attempted to handle request: authUsers=%s authExs=%s",
+ authUsers, authExs);
+ throw new AuthException(msg);
+ }
+
+ @Override
+ public String getDomain() {
+ throw new UnsupportedOperationException("UniversalAuthBackend doesn't support domain.");
+ }
+}