package storm.trident.testing;
import backtype.storm.Config;
import backtype.storm.task.TopologyContext;
import backtype.storm.tuple.Fields;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import storm.trident.operation.TridentCollector;
import storm.trident.spout.IBatchSpout;
public class FixedBatchSpout implements IBatchSpout {
Fields fields;
List<Object>[] outputs;
int maxBatchSize;
HashMap<Long, List<List<Object>>> batches = new HashMap<Long, List<List<Object>>>();
public FixedBatchSpout(Fields fields, int maxBatchSize, List<Object>... outputs) {
this.fields = fields;
this.outputs = outputs;
this.maxBatchSize = maxBatchSize;
}
int index = 0;
boolean cycle = false;
public void setCycle(boolean cycle) {
this.cycle = cycle;
}
@Override
public void open(Map conf, TopologyContext context) {
index = 0;
}
@Override
public void emitBatch(long batchId, TridentCollector collector) {
List<List<Object>> batch = this.batches.get(batchId);
if(batch == null){
batch = new ArrayList<List<Object>>();
if(index>=outputs.length && cycle) {
index = 0;
}
for(int i=0; index < outputs.length && i < maxBatchSize; index++, i++) {
batch.add(outputs[index]);
}
this.batches.put(batchId, batch);
}
for(List<Object> list : batch){
collector.emit(list);
}
}
@Override
public void ack(long batchId) {
this.batches.remove(batchId);
}
@Override
public void close() {
}
@Override
public Map getComponentConfiguration() {
Config conf = new Config();
conf.setMaxTaskParallelism(1);
return conf;
}
@Override
public Fields getOutputFields() {
return fields;
}
}