1 files changed, 55 insertions, 0 deletions
diff --git a/container-core/src/main/java/com/yahoo/jdisc/http/filter/chain/RequestFilterChain.java b/container-core/src/main/java/com/yahoo/jdisc/http/filter/chain/RequestFilterChain.java
new file mode 100644
index 00000000000..85f71777cf3
--- /dev/null
+++ b/container-core/src/main/java/com/yahoo/jdisc/http/filter/chain/RequestFilterChain.java
@@ -0,0 +1,55 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.jdisc.http.filter.chain;
+
+import com.yahoo.jdisc.AbstractResource;
+import com.yahoo.jdisc.application.ResourcePool;
+import com.yahoo.jdisc.handler.ResponseHandler;
+import com.yahoo.jdisc.http.HttpRequest;
+import com.yahoo.jdisc.http.filter.RequestFilter;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * @author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
+ */
+public final class RequestFilterChain extends AbstractResource implements RequestFilter {
+
+    private final List<RequestFilter> filters = new ArrayList<>();
+    private final ResourcePool filterReferences = new ResourcePool();
+
+    private RequestFilterChain(Iterable<? extends RequestFilter> filters) {
+        for (RequestFilter filter : filters) {
+            this.filters.add(filter);
+            filterReferences.retain(filter);
+        }
+    }
+
+    @Override
+    public void filter(HttpRequest request, ResponseHandler responseHandler) {
+        ResponseHandlerGuard guard = new ResponseHandlerGuard(responseHandler);
+        for (int i = 0, len = filters.size(); i < len && !guard.isDone(); ++i) {
+            filters.get(i).filter(request, guard);
+        }
+    }
+
+    @Override
+    protected void destroy() {
+        filterReferences.release();
+    }
+
+    public static RequestFilter newInstance(RequestFilter... filters) {
+        return newInstance(Arrays.asList(filters));
+    }
+
+    public static RequestFilter newInstance(List<? extends RequestFilter> filters) {
+        if (filters.size() == 0) {
+            return EmptyRequestFilter.INSTANCE;
+        }
+        if (filters.size() == 1) {
+            return filters.get(0);
+        }
+        return new RequestFilterChain(filters);
+    }
+}