Github user mbalassi commented on a diff in the pull request:
https://github.com/apache/flink/pull/573#discussion_r27808721
--- Diff:
flink-staging/flink-streaming/flink-storm-compatibility/src/main/java/org/apache/flink/stormcompatibility/api/FlinkTopologyBuilder.java
---
@@ -0,0 +1,294 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.flink.stormcompatibility.api;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.stormcompatibility.wrappers.StormBoltWrapper;
+import org.apache.flink.stormcompatibility.wrappers.StormSpoutWrapper;
+import org.apache.flink.streaming.api.datastream.DataStream;
+
+import backtype.storm.generated.ComponentCommon;
+import backtype.storm.generated.GlobalStreamId;
+import backtype.storm.generated.Grouping;
+import backtype.storm.generated.StormTopology;
+import backtype.storm.topology.BasicBoltExecutor;
+import backtype.storm.topology.BoltDeclarer;
+import backtype.storm.topology.IBasicBolt;
+import backtype.storm.topology.IRichBolt;
+import backtype.storm.topology.IRichSpout;
+import backtype.storm.topology.SpoutDeclarer;
+import backtype.storm.topology.TopologyBuilder;
+
+
+
+
+
+/**
+ * {@link FlinkTopologyBuilder} mimics a {@link TopologyBuilder}, but
builds a Flink program instead of a Storm
+ * topology. Most methods (except {@link #createTopology()} are copied
from the original {@link TopologyBuilder}
+ * implementation to ensure equal behavior.<br />
+ * <br />
+ * <strong>CAUTION: {@link StateSpout}s and multiple output streams per
spout/bolt are currently not supported.</strong>
+ *
+ * @author mjsax
+ */
+public class FlinkTopologyBuilder {
+ /**
+ * A Storm {@link TopologyBuilder} to build a real Storm topology.
+ */
+ private final TopologyBuilder stormBuilder = new TopologyBuilder();
+ /**
+ * All user spouts by their ID.
+ */
+ private final HashMap<String, IRichSpout> spouts = new HashMap<String,
IRichSpout>();
+ /**
+ * All user bolts by their ID.
+ */
+ private final HashMap<String, IRichBolt> bolts = new HashMap<String,
IRichBolt>();
+
+ // TODO add StateSpout support (Storm 0.9.4 does not yet support
StateSpouts itself)
+
+
+
+ /**
+ * Creates a Flink program that used the specified spouts and bolts.
+ */
+ @SuppressWarnings({"unchecked", "rawtypes"})
+ public FlinkTopology createTopology() {
+ final StormTopology stormTopolgoy =
this.stormBuilder.createTopology();
--- End diff --
Nice! :+1:
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