Coverage Report - org.galagosearch.tupleflow.execution.ConnectionAssignmentType
 
Classes in this File Line Coverage Branch Coverage Complexity
ConnectionAssignmentType
100%
4/4
N/A
0
ConnectionAssignmentType$1
50%
1/2
N/A
0
ConnectionAssignmentType$2
50%
1/2
N/A
0
ConnectionAssignmentType$3
50%
1/2
N/A
0
 
 1  
 // BSD License (http://www.galagosearch.org/license)
 2  
 package org.galagosearch.tupleflow.execution;
 3  
 
 4  
 /**
 5  
  * <p>This specifies how input data should be assigned to outputs
 6  
  * in a TupleFlow connection.</p> 
 7  
  * 
 8  
  * <p>If a connection output has the "Combined" assignment, that means
 9  
  * that each stage instance reading that output will recieve all of the
 10  
  * input data.  This is the right kind of assignment to use when writing
 11  
  * out a single index file, for instance, where you want all the data
 12  
  * that was genereated by lots of parsing stage instances.</p>
 13  
  * 
 14  
  * <p>The "Each" mode means that every output stage instance gets
 15  
  * exactly one of the output streams.  Notice that a connection can be 
 16  
  * hashed, so this doesn't necessarily imply a 1-to-1 mapping between
 17  
  * inputs and outputs.  This is what you want to use when you're
 18  
  * trying to distribute data broadly across a cluster of machines.</p>
 19  
  * 
 20  
  * <p>The "One" mode is not yet supported.  The "One" mode, when implemented,
 21  
  * will allow each different named output to recieve exactly one share of the
 22  
  * input data.  The main use case for this is to support building document-distributed
 23  
  * indexes.</p>
 24  
  * 
 25  
  * @see org.galagosearch.tupleflow.execution.Connection
 26  
  * @see org.galagosearch.tupleflow.execution.Job
 27  
  * @author trevor
 28  
  */
 29  14
 public enum ConnectionAssignmentType {
 30  2
     Each {
 31  
         @Override
 32  2
         public String toString() {
 33  0
             return "each";
 34  
         }
 35  
     },
 36  2
     One {
 37  
         @Override
 38  2
         public String toString() {
 39  0
             return "one";
 40  
         }
 41  
     },
 42  2
     Combined {
 43  
         @Override
 44  2
         public String toString() {
 45  0
             return "combined";
 46  
         }
 47  
     }
 48  
 };