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1 files changed, 86 insertions, 0 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/searchchain/FutureResult.java b/container-search/src/main/java/com/yahoo/search/searchchain/FutureResult.java
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+++ b/container-search/src/main/java/com/yahoo/search/searchchain/FutureResult.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.searchchain;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.FutureTask;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.yahoo.yolean.Exceptions;
+import com.yahoo.search.Query;
+import com.yahoo.search.Result;
+import com.yahoo.search.result.ErrorMessage;
+
+/**
+ * Extends a {@code FutureTask<Result>}, with some added error handling
+ */
+public class FutureResult extends FutureTask<Result> {
+
+    private final Query query;
+
+    /** Only used for generating messages */
+    private final Execution execution;
+
+    private final static Logger log = Logger.getLogger(FutureResult.class.getName());
+
+    FutureResult(Callable<Result> callable, Execution execution, final Query query) {
+        super(callable);
+        this.query = query;
+        this.execution = execution;
+    }
+
+    @Override
+    public Result get() {
+        Result result;
+        try {
+            result = super.get();
+        }
+        catch (InterruptedException e) {
+            result = new Result(getQuery(), ErrorMessage.createUnspecifiedError(
+                    "'" + execution + "' was interrupted while executing: " + Exceptions.toMessageString(e)));
+        }
+        catch (ExecutionException e) {
+            log.log(Level.WARNING,"Exception on executing " + execution + " for " + query,e);
+            result = new Result(getQuery(), ErrorMessage.createErrorInPluginSearcher(
+                    "Error in '" + execution + "': " + Exceptions.toMessageString(e),
+                    e.getCause()));
+        }
+        return result;
+    }
+
+    @Override
+    public Result get(long timeout, TimeUnit timeunit) {
+        Result result;
+        try {
+            result = super.get(timeout, timeunit);
+        }
+        catch (InterruptedException e) {
+            result = new Result(getQuery(), ErrorMessage.createUnspecifiedError(
+                    "'" + execution + "' was interrupted while executing: " + Exceptions.toMessageString(e)));
+        }
+        catch (ExecutionException e) {
+            log.log(Level.WARNING,"Exception on executing " + execution + " for " + query, e);
+            result = new Result(getQuery(), ErrorMessage.createErrorInPluginSearcher(
+                    "Error in '" + execution + "': " + Exceptions.toMessageString(e),
+                    e.getCause()));
+        }
+        catch (TimeoutException e) {
+            result = new Result(getQuery(), createTimeoutError());
+        }
+        return result;
+    }
+
+    /** Returns the query used in this execution, never null */
+    public Query getQuery() {
+        return query;
+    }
+
+    ErrorMessage createTimeoutError() {
+        return ErrorMessage.createTimeout(
+                "Error executing '" + execution + "': " + " Chain timed out.");
+
+    }
+}