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java/org/apache/catalina/authenticator/jaspic/SimpleAuthConfigProvider.java

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+/**
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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 org.apache.catalina.authenticator.jaspic;
+
+import java.util.Map;
+
+import javax.security.auth.callback.CallbackHandler;
+import javax.security.auth.message.AuthException;
+import javax.security.auth.message.config.AuthConfigFactory;
+import javax.security.auth.message.config.AuthConfigProvider;
+import javax.security.auth.message.config.ClientAuthConfig;
+import javax.security.auth.message.config.ServerAuthConfig;
+
+/**
+ * Basic implementation primarily intended for use when using third-party
+ * {@link javax.security.auth.message.module.ServerAuthModule} implementations
+ * that only provide the module.
+ */
+public class SimpleAuthConfigProvider implements AuthConfigProvider {
+
+    private final Map<String,String> properties;
+
+    private volatile ServerAuthConfig serverAuthConfig;
+
+    public SimpleAuthConfigProvider(Map<String,String> properties, AuthConfigFactory factory) {
+        this.properties = properties;
+        if (factory != null) {
+            factory.registerConfigProvider(this, null, null, "Automatic registration");
+        }
+    }
+
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * This implementation does not support client-side authentication and
+     * therefore always returns {@code null}.
+     */
+    @Override
+    public ClientAuthConfig getClientAuthConfig(String layer, String appContext,
+            CallbackHandler handler) throws AuthException {
+        return null;
+    }
+
+
+    @Override
+    public ServerAuthConfig getServerAuthConfig(String layer, String appContext,
+            CallbackHandler handler) throws AuthException {
+        ServerAuthConfig serverAuthConfig = this.serverAuthConfig;
+        if (serverAuthConfig == null) {
+            synchronized (this) {
+                if (this.serverAuthConfig == null) {
+                    this.serverAuthConfig = createServerAuthConfig(layer, appContext, handler, properties);
+                }
+                serverAuthConfig = this.serverAuthConfig;
+            }
+        }
+        return serverAuthConfig;
+    }
+
+
+    protected ServerAuthConfig createServerAuthConfig(String layer, String appContext,
+            CallbackHandler handler, Map<String,String> properties) {
+        return new SimpleServerAuthConfig(layer, appContext, handler, properties);
+    }
+
+
+    @Override
+    public void refresh() {
+        ServerAuthConfig serverAuthConfig = this.serverAuthConfig;
+        if (serverAuthConfig != null) {
+            serverAuthConfig.refresh();
+        }
+    }
+}