Allow filter extensions to define init parameters in IStoredSettings

src/main/java/com/gitblit/servlet/FilterRuntimeConfig.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2014 gitblit.com.
+ *
+ * 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.gitblit.servlet;
+
+import java.util.Enumeration;
+
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletContext;
+
+import com.gitblit.IStoredSettings;
+import com.gitblit.manager.IRuntimeManager;
+
+/**
+ * Wraps a filter config and will prefer a setting retrieved from IStoredSettings
+ * if one is available.
+ *
+ * @author James Moger
+ * @since 1.6.0
+ */
+public class FilterRuntimeConfig implements FilterConfig {
+
+	final IRuntimeManager runtime;
+	final IStoredSettings settings;
+	final String namespace;
+	final FilterConfig config;
+
+	public FilterRuntimeConfig(IRuntimeManager runtime, String namespace, FilterConfig config) {
+		this.runtime = runtime;
+		this.settings = runtime.getSettings();
+		this.namespace = namespace;
+		this.config = config;
+	}
+
+	@Override
+	public String getFilterName() {
+		return config.getFilterName();
+	}
+
+	@Override
+	public ServletContext getServletContext() {
+		return config.getServletContext();
+	}
+
+	@Override
+	public String getInitParameter(String name) {
+		String key = namespace + "." + name;
+		if (settings.hasSettings(key)) {
+			String value = settings.getString(key, null);
+			return value;
+		}
+		return config.getInitParameter(name);
+	}
+
+	@Override
+	public Enumeration<String> getInitParameterNames() {
+		return config.getInitParameterNames();
+	}
+}

src/main/java/com/gitblit/servlet/ProxyFilter.java

@@ -25,14 +25,17 @@ import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
 
+import ro.fortsoft.pf4j.PluginWrapper;
+
 import com.gitblit.dagger.DaggerFilter;
 import com.gitblit.extensions.HttpRequestFilter;
 import com.gitblit.manager.IPluginManager;
+import com.gitblit.manager.IRuntimeManager;
 
 import dagger.ObjectGraph;
 
 /**
- * A request filter than allows regsitered extension request filters to access
+ * A request filter than allows registered extension request filters to access
  * request data.  The intended purpose is for server monitoring plugins.
  *
  * @author David Ostrovsky
@@ -43,10 +46,17 @@ public class ProxyFilter extends DaggerFilter {
 
 	@Override
 	protected void inject(ObjectGraph dagger, FilterConfig filterConfig) throws ServletException {
+		IRuntimeManager runtimeManager = dagger.get(IRuntimeManager.class);
 		IPluginManager pluginManager = dagger.get(IPluginManager.class);
+
 		filters = pluginManager.getExtensions(HttpRequestFilter.class);
 		for (HttpRequestFilter f : filters) {
-			f.init(filterConfig);
+			// wrap the filter config for Gitblit settings retrieval
+			PluginWrapper pluginWrapper = pluginManager.whichPlugin(f.getClass());
+			FilterConfig runtimeConfig = new FilterRuntimeConfig(runtimeManager,
+					pluginWrapper.getPluginId(), filterConfig);
+
+			f.init(runtimeConfig);
 		}
 	}