Examples of com.cloudera.flume.conf.PatternMatch.match()

Class com.cloudera.flume.conf.PatternMatch

Examples of com.cloudera.flume.conf.PatternMatch.match()

com.cloudera.flume.conf.PatternMatch.match()
Returns null if there is no match. Returns empty list if the tree matches. Returns map of name->CommonTree bindings if there is a match and there were pattern variables specified. For bindings, we favor parent of child and left child over right child.

  static CommonTree substBEChains(String sink, List<String> collectors)
      throws RecognitionException, FlumeSpecException {


    PatternMatch bePat = recursive(var("be", FlumePatterns.sink(AUTO_BE)));
    CommonTree sinkTree = FlumeBuilder.parseSink(sink);
    Map<String, CommonTree> beMatches = bePat.match(sinkTree);


    ArrayList<String> collSnks = new ArrayList<String>();
    for (String coll : collectors) {
      collSnks.add("{ lazyOpen => logicalSink(\"" + coll + "\") }");
    }

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        sinkTree = beFailChain;
      } else {
        parent.replaceChildren(idx, idx, beFailChain);
      }
      // patern match again.
      beMatches = bePat.match(sinkTree);
    }
    return sinkTree;
  }


  /**

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  static CommonTree substDFOChainsNoLet(String sink, List<String> collectors)
      throws RecognitionException, FlumeSpecException {
    PatternMatch dfoPat = recursive(var("dfo", FlumePatterns.sink(AUTO_DFO)));


    CommonTree sinkTree = FlumeBuilder.parseSink(sink);
    Map<String, CommonTree> dfoMatches = dfoPat.match(sinkTree);
    if (dfoMatches == null) {
      return sinkTree;
    }


    while (dfoMatches != null) {

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        sinkTree = newDfoTree;
      } else {
        parent.replaceChildren(idx, idx, newDfoTree);
      }
      // pattern match again.
      dfoMatches = dfoPat.match(sinkTree);
    }
    return sinkTree;
  }


  /**

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  static CommonTree substDFOChains(String sink, List<String> collectors)
      throws RecognitionException, FlumeSpecException {
    PatternMatch dfoPat = recursive(var("dfo", FlumePatterns.sink(AUTO_DFO)));


    CommonTree sinkTree = FlumeBuilder.parseSink(sink);
    Map<String, CommonTree> dfoMatches = dfoPat.match(sinkTree);
    if (dfoMatches == null) {
      return sinkTree;
    }


    while (dfoMatches != null) {

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        sinkTree = newDfoTree;
      } else {
        parent.replaceChildren(idx, idx, newDfoTree);
      }
      // pattern match again.
      dfoMatches = dfoPat.match(sinkTree);
    }
    return sinkTree;
  }


  /**

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  static CommonTree substE2EChains(String sink, List<String> collectors)
      throws RecognitionException, FlumeSpecException {


    PatternMatch e2ePat = recursive(var("e2e", FlumePatterns.sink(AUTO_E2E)));
    CommonTree sinkTree = FlumeBuilder.parseSink(sink);
    Map<String, CommonTree> e2eMatches = e2ePat.match(sinkTree);


    if (e2eMatches == null) {
      // bail out early.
      return sinkTree;
    }

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      } else {
        parent.replaceChildren(idx, idx, beFailChain);
      }


      // pattern match again.
      e2eMatches = e2ePat.match(sinkTree);


    }


    // wrap the sink with the ackedWriteAhead
    CommonTree wrapper = FlumeBuilder

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    // wrap the sink with the ackedWriteAhead
    CommonTree wrapper = FlumeBuilder
        .parseSink("{ ackedWriteAhead => { stubbornAppend => { insistentOpen => null } } }");
    PatternMatch nullPath = recursive(var("x", FlumePatterns.sink("null")));
    CommonTree replace = nullPath.match(wrapper).get("x");
    int idx = replace.getChildIndex();
    replace.parent.replaceChildren(idx, idx, sinkTree);
    return wrapper;
  }

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  static CommonTree substE2EChainsSimple(String sink, List<String> collectors)
      throws RecognitionException, FlumeSpecException {


    PatternMatch e2ePat = recursive(var("e2e", FlumePatterns.sink(AUTO_E2E)));
    CommonTree sinkTree = FlumeBuilder.parseSink(sink);
    Map<String, CommonTree> e2eMatches = e2ePat.match(sinkTree);


    if (e2eMatches == null) {
      // bail out early.
      return sinkTree;
    }

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