1 files changed, 82 insertions, 0 deletions
diff --git a/container-core/src/main/java/com/yahoo/processing/response/FutureResponse.java b/container-core/src/main/java/com/yahoo/processing/response/FutureResponse.java
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+++ b/container-core/src/main/java/com/yahoo/processing/response/FutureResponse.java
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+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.processing.response;
+
+import com.google.common.util.concurrent.ForwardingFuture;
+import com.google.common.util.concurrent.ListenableFutureTask;
+import com.yahoo.processing.Request;
+import com.yahoo.processing.Response;
+import com.yahoo.processing.execution.Execution;
+import com.yahoo.processing.request.ErrorMessage;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * A processing response which will arrive in the future.
+ *
+ * @author bratseth
+ */
+public class FutureResponse extends ForwardingFuture<Response> {
+
+    private final Request request;
+
+    /**
+     * Only used for generating messages
+     */
+    private final Execution execution;
+
+    private final static Logger log = Logger.getLogger(FutureResponse.class.getName());
+
+    private final ListenableFutureTask<Response> futureTask;
+
+    public FutureResponse(final Callable<Response> callable, Execution execution, final Request request) {
+        this.futureTask = ListenableFutureTask.create(callable);
+        this.request = request;
+        this.execution = execution;
+    }
+
+    @Override
+    public ListenableFutureTask<Response> delegate() {
+        return futureTask;
+    }
+
+    public
+    @Override
+    Response get() {
+        try {
+            return super.get();
+        } catch (InterruptedException e) {
+            return new Response(request, new ErrorMessage("'" + execution + "' was interrupted", e));
+        } catch (ExecutionException e) {
+            log.log(Level.WARNING, "Exception on executing " + execution + " for " + request, e);
+            return new Response(request, new ErrorMessage("Error in '" + execution + "'", e));
+        }
+    }
+
+    public
+    @Override
+    Response get(long timeout, TimeUnit timeunit) {
+        try {
+            return super.get(timeout, timeunit);
+        } catch (InterruptedException e) {
+            return new Response(request, new ErrorMessage("'" + execution + "' was interrupted", e));
+        } catch (ExecutionException e) {
+            log.log(Level.WARNING, "Exception on executing " + execution + " for " + request, e);
+            return new Response(request, new ErrorMessage("Error in '" + execution + "'", e));
+        } catch (TimeoutException e) {
+            return new Response(request, new ErrorMessage("Error executing '" + execution + "': " + " Chain timed out."));
+        }
+    }
+
+    /**
+     * Returns the query used in this execution, never null
+     */
+    public Request getRequest() {
+        return request;
+    }
+
+}