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[GAE-Java] Remove String-specialized FFI classes and Simplify Java Me…
…ssageManager interface (#2195) * Simplify Java MessageManager interface for better user experience. * Remove specialized FFI interface for Java String vd/ed Fragment . * Some other minor changes.
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75 changes: 75 additions & 0 deletions
75
...ine/java/grape-demo/src/main/java/com/alibaba/graphscope/example/stringApp/StringApp.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| package com.alibaba.graphscope.example.stringApp; | ||
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| import com.alibaba.graphscope.app.ParallelAppBase; | ||
| import com.alibaba.graphscope.context.ParallelContextBase; | ||
| import com.alibaba.graphscope.ds.StringView; | ||
| import com.alibaba.graphscope.ds.Vertex; | ||
| import com.alibaba.graphscope.ds.adaptor.Nbr; | ||
| import com.alibaba.graphscope.fragment.IFragment; | ||
| import com.alibaba.graphscope.parallel.ParallelEngine; | ||
| import com.alibaba.graphscope.parallel.ParallelMessageManager; | ||
| import com.alibaba.graphscope.utils.FFITypeFactoryhelper; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| public class StringApp | ||
| implements ParallelAppBase<Long, Long, StringView, StringView, StringAppContext>, | ||
| ParallelEngine { | ||
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| private static Logger logger = LoggerFactory.getLogger(ParallelAppBase.class); | ||
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| /** | ||
| * Partial Evaluation to implement. | ||
| * | ||
| * @param graph fragment. The graph fragment providing accesses to graph data. | ||
| * @param context context. User defined context which manages data during the whole | ||
| * computations. | ||
| * @param messageManager The message manger which manages messages between fragments. | ||
| * @see IFragment | ||
| * @see ParallelContextBase | ||
| * @see ParallelMessageManager | ||
| */ | ||
| @Override | ||
| public void PEval( | ||
| IFragment<Long, Long, StringView, StringView> graph, | ||
| ParallelContextBase<Long, Long, StringView, StringView> context, | ||
| ParallelMessageManager messageManager) { | ||
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| StringAppContext ctx = (StringAppContext) context; | ||
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| Vertex<Long> vertex = FFITypeFactoryhelper.newVertexLong(); | ||
| long batch = graph.getInnerVerticesNum() / 10; | ||
| for (long i = 0; i < graph.getInnerVerticesNum(); i += batch) { | ||
| vertex.setValue(i); | ||
| for (Nbr<Long, StringView> nbr : graph.getOutgoingAdjList(vertex).iterable()) { | ||
| logger.info( | ||
| "Edge {}({})->{}({}), ed {}", | ||
| graph.getId(vertex), | ||
| graph.getData(vertex).toJavaString(), | ||
| graph.getId(nbr.neighbor()), | ||
| graph.getData(nbr.neighbor()), | ||
| nbr.data()); | ||
| } | ||
| } | ||
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| messageManager.forceContinue(); | ||
| } | ||
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| /** | ||
| * Incremental Evaluation to implement. | ||
| * | ||
| * @param graph fragment. The graph fragment providing accesses to graph data. | ||
| * @param context context. User defined context which manages data during the whole | ||
| * computations. | ||
| * @param messageManager The message manger which manages messages between fragments. | ||
| * @see IFragment | ||
| * @see ParallelContextBase | ||
| * @see ParallelMessageManager | ||
| */ | ||
| @Override | ||
| public void IncEval( | ||
| IFragment<Long, Long, StringView, StringView> graph, | ||
| ParallelContextBase<Long, Long, StringView, StringView> context, | ||
| ParallelMessageManager messageManager) {} | ||
| } |
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