bundles/org.simantics.history/examples/org/simantics/history/examples/CollectorExample1.java

   1 package org.simantics.history.examples;
   2
   3 import java.util.UUID;
   4
   5 import org.simantics.databoard.Bindings;
   6 import org.simantics.databoard.Datatypes;
   7 import org.simantics.databoard.accessor.StreamAccessor;
   8 import org.simantics.databoard.accessor.error.AccessorException;
   9 import org.simantics.databoard.binding.RecordBinding;
  10 import org.simantics.databoard.binding.error.BindingException;
  11 import org.simantics.databoard.type.RecordType;
  12 import org.simantics.databoard.util.Bean;
  13 import org.simantics.history.Collector;
  14 import org.simantics.history.History;
  15 import org.simantics.history.HistoryAndCollectorItem;
  16 import org.simantics.history.HistoryException;
  17 import org.simantics.history.HistoryItem;
  18 import org.simantics.history.HistoryManager;
  19 import org.simantics.history.impl.FlushPolicy;
  20
  21 public class CollectorExample1 {
  22
  23         public static void main(String[] args) throws HistoryException, BindingException, AccessorException {
  24
  25                 /// Example1: Create History Manager & Item
  26                 // Create History Manager
  27                 HistoryManager history = History.createMemoryHistory();
  28
  29                 // Create a sample format
  30                 RecordType sampleFormat = new RecordType();
  31                 sampleFormat.addComponent("time", Datatypes.DOUBLE );
  32                 sampleFormat.addComponent("value", Datatypes.DOUBLE );
  33                 sampleFormat.addComponent("quality", Datatypes.BYTE );
  34
  35                 // Create History Item configuration
  36                 String id = UUID.randomUUID().toString();
  37                 HistoryItem historyItem = new HistoryItem(id, sampleFormat);
  38
  39                 // Create the item in the history
  40                 history.create( historyItem );
  41
  42
  43
  44
  45
  46                 /// Example2: Prepare Collector
  47                 Collector collector = History.createCollector(history, FlushPolicy.NoFlush);
  48
  49                 // Read item configuration data from history ( id and sampleFormat )
  50                 Bean hi = history.getItem( id );
  51
  52                 // Create collector item
  53                 HistoryAndCollectorItem ci = new HistoryAndCollectorItem();
  54                 ci.readAvailableFields( hi ); // Read: id, sampleFormat
  55                 ci.interval = 0.5;
  56                 //ci.deadband = 10;
  57                 ci.enabled = true;
  58                 ci.gain = 10.0;
  59                 ci.variableId = "MyItem";
  60
  61                 // Initialize Collector (Item)
  62                 collector.addItem( ci );
  63
  64                 try {
  65                         // Simulate 100 steps
  66                         for ( int i = 0; i<100; i++ ) {
  67
  68                                 // Our "simulation" results
  69                                 double time = i * 0.1;
  70                                 double myItemValue = -20 + i*0.1;
  71
  72                                 // Begin collector writing step
  73                                 collector.beginStep(Bindings.DOUBLE, time);
  74
  75                                 // Enter values
  76                                 collector.setValue("MyItem", Bindings.DOUBLE, myItemValue);
  77
  78                                 // End collector step
  79                                 collector.endStep();
  80                         }
  81
  82                 } finally {
  83                         // Flush values
  84                         collector.flush();
  85                         collector.close();
  86                 }
  87
  88
  89
  90                 /// Print results
  91                 // Open stream from history
  92                 StreamAccessor aa = history.openStream(id, "r");
  93                 // Read sample type
  94                 RecordType sampleType = (RecordType) aa.type().componentType;
  95                 // Create bean binding
  96                 RecordBinding sampleBinding = (RecordBinding) Bindings.getBeanBinding( sampleType );
  97                 // Create sample object
  98                 Bean sample = (Bean) sampleBinding.createPartial();
  99
 100                 try {
 101                         for (int i=0; i<aa.size(); i++) {
 102                                 aa.get(i, sampleBinding, sample);
 103                                 System.out.println(i+": "+sample);
 104                         }
 105                 } finally {
 106                         aa.close();
 107                 }
 108
 109         }
 110
 111 }