Dispatcher Phase 1

presto-main/src/main/java/com/facebook/presto/dispatcher/CoordinatorLocation.java

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+/*
+ * 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.facebook.presto.dispatcher;
+
+import javax.ws.rs.core.UriInfo;
+
+import java.net.URI;
+
+public interface CoordinatorLocation
+{
+    URI getUri(UriInfo uriInfo, String xForwardedProto);
+}

presto-main/src/main/java/com/facebook/presto/dispatcher/DispatchExecutor.java

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+/*
+ * 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.facebook.presto.dispatcher;
+
+import com.facebook.presto.execution.QueryManagerConfig;
+import com.google.common.io.Closer;
+import com.google.common.util.concurrent.ListeningExecutorService;
+import com.google.common.util.concurrent.ListeningScheduledExecutorService;
+import io.airlift.concurrent.ThreadPoolExecutorMBean;
+import org.weakref.jmx.Flatten;
+import org.weakref.jmx.Managed;
+import org.weakref.jmx.Nested;
+
+import javax.annotation.PreDestroy;
+import javax.inject.Inject;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ThreadPoolExecutor;
+
+import static com.google.common.util.concurrent.MoreExecutors.listeningDecorator;
+import static io.airlift.concurrent.Threads.daemonThreadsNamed;
+import static java.util.Objects.requireNonNull;
+import static java.util.concurrent.Executors.newCachedThreadPool;
+import static java.util.concurrent.Executors.newScheduledThreadPool;
+
+public class DispatchExecutor
+{
+    private final Closer closer = Closer.create();
+
+    private final ListeningExecutorService executor;
+    private final ListeningScheduledExecutorService scheduledExecutor;
+
+    private final DispatchExecutorMBeans mbeans;
+
+    @Inject
+    public DispatchExecutor(QueryManagerConfig config)
+    {
+        ExecutorService coreExecutor = newCachedThreadPool(daemonThreadsNamed("dispatcher-query-%s"));
+        closer.register(coreExecutor::shutdownNow);
+        executor = listeningDecorator(coreExecutor);
+
+        ScheduledExecutorService coreScheduledExecutor = newScheduledThreadPool(config.getQueryManagerExecutorPoolSize(), daemonThreadsNamed("dispatch-executor-%s"));
+        closer.register(coreScheduledExecutor::shutdownNow);
+        scheduledExecutor = listeningDecorator(coreScheduledExecutor);
+
+        mbeans = new DispatchExecutorMBeans(coreExecutor, coreScheduledExecutor);
+    }
+
+    public ListeningExecutorService getExecutor()
+    {
+        return executor;
+    }
+
+    public ListeningScheduledExecutorService getScheduledExecutor()
+    {
+        return scheduledExecutor;
+    }
+
+    @Managed
+    @Flatten
+    public DispatchExecutorMBeans getMbeans()
+    {
+        return mbeans;
+    }
+
+    @PreDestroy
+    public void shutdown()
+            throws Exception
+    {
+        closer.close();
+    }
+
+    public class DispatchExecutorMBeans
+    {
+        private final ThreadPoolExecutorMBean executor;
+        private final ThreadPoolExecutorMBean scheduledExecutor;
+
+        public DispatchExecutorMBeans(ExecutorService coreExecutor, ScheduledExecutorService coreScheduledExecutor)
+        {
+            requireNonNull(coreExecutor, "coreExecutor is null");
+            requireNonNull(coreScheduledExecutor, "coreScheduledExecutor is null");
+            executor = new ThreadPoolExecutorMBean((ThreadPoolExecutor) coreExecutor);
+            scheduledExecutor = new ThreadPoolExecutorMBean((ThreadPoolExecutor) coreScheduledExecutor);
+        }
+
+        @Managed
+        @Nested
+        public ThreadPoolExecutorMBean getExecutor()
+        {
+            return executor;
+        }
+
+        @Managed
+        @Nested
+        public ThreadPoolExecutorMBean getScheduledExecutor()
+        {
+            return scheduledExecutor;
+        }
+    }
+}

presto-main/src/main/java/com/facebook/presto/dispatcher/DispatchInfo.java

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+/*
+ * 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.facebook.presto.dispatcher;
+
+import com.facebook.presto.execution.ExecutionFailureInfo;
+import io.airlift.units.Duration;
+
+import java.util.Optional;
+
+import static java.util.Objects.requireNonNull;
+
+public class DispatchInfo
+{
+    private final Optional<CoordinatorLocation> coordinatorLocation;
+    private final Optional<ExecutionFailureInfo> failureInfo;
+    private final Duration elapsedTime;
+    private final Duration queuedTime;
+
+    public static DispatchInfo queued(Duration elapsedTime, Duration queuedTime)
+    {
+        return new DispatchInfo(Optional.empty(), Optional.empty(), elapsedTime, queuedTime);
+    }
+
+    public static DispatchInfo dispatched(CoordinatorLocation coordinatorLocation, Duration elapsedTime, Duration queuedTime)
+    {
+        requireNonNull(coordinatorLocation, "coordinatorLocation is null");
+        return new DispatchInfo(Optional.of(coordinatorLocation), Optional.empty(), elapsedTime, queuedTime);
+    }
+
+    public static DispatchInfo failed(ExecutionFailureInfo failureInfo, Duration elapsedTime, Duration queuedTime)
+    {
+        requireNonNull(failureInfo, "coordinatorLocation is null");
+        return new DispatchInfo(Optional.empty(), Optional.of(failureInfo), elapsedTime, queuedTime);
+    }
+
+    private DispatchInfo(Optional<CoordinatorLocation> coordinatorLocation, Optional<ExecutionFailureInfo> failureInfo, Duration elapsedTime, Duration queuedTime)
+    {
+        this.coordinatorLocation = requireNonNull(coordinatorLocation, "coordinatorLocation is null");
+        this.failureInfo = requireNonNull(failureInfo, "failureInfo is null");
+        this.elapsedTime = requireNonNull(elapsedTime, "elapsedTime is null");
+        this.queuedTime = requireNonNull(queuedTime, "queuedTime is null");
+    }
+
+    public Optional<CoordinatorLocation> getCoordinatorLocation()
+    {
+        return coordinatorLocation;
+    }
+
+    public Optional<ExecutionFailureInfo> getFailureInfo()
+    {
+        return failureInfo;
+    }
+
+    public Duration getElapsedTime()
+    {
+        return elapsedTime;
+    }
+
+    public Duration getQueuedTime()
+    {
+        return queuedTime;
+    }
+}