Even more atomic router configuration.

[xmlrouter] / impl / src / main / java / org / wamblee / xmlrouter / impl / XMLRouterConfiguration.java

diff --git a/impl/src/main/java/org/wamblee/xmlrouter/impl/XMLRouterConfiguration.java b/impl/src/main/java/org/wamblee/xmlrouter/impl/XMLRouterConfiguration.java
new file mode 100644 (file)
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+++ b/impl/src/main/java/org/wamblee/xmlrouter/impl/XMLRouterConfiguration.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2005-2011 the original author or authors.
+ * 
+ * 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 org.wamblee.xmlrouter.impl;
+
+/**
+ * The XML Router configuration contains both configuration data as well as
+ * derived data used by the XML router. It is important that all this data is
+ * consistent. Therefore, this class provides a read-write locking mechanism for
+ * accessing the data.
+ * 
+ * @author Erik Brakkee
+ * 
+ */
+public interface XMLRouterConfiguration {
+
+    /**
+     * To be called before the configuration is updated. Corresponds to write
+     * lock acquire.
+     */
+    void startConfigurationChange();
+
+    /**
+     * To be called after the configuration is updated. Corresponds to write
+     * lock acquire.
+     */
+    void endConfigurationChange();
+
+    /**
+     * To be called before the configuration is used. Corresponds to read lock
+     * acquire.
+     */
+    void startPublishEvent();
+
+    /**
+     * To be called after the configuration is used. Corresponds to read lock
+     * release.
+     */
+    void endPublishEvent();
+
+    /**
+     * @return Configuration data.
+     */
+    ExtendedRouterConfig routerConfig();
+
+    /**
+     * @return Transformation paths (derived data).
+     */
+    TransformationPaths transformations();
+}