IN PROGRESS - issue BATCH-7: Remove transaction synchronization and state management from input/output sources (formerly buffering)

http://jira.springframework.org/browse/BATCH-7

Remove Statistics* - use StreamContext instead.

spring-batch-samples/src/main/java/org/springframework/batch/sample/tasklet/InfiniteLoopTasklet.java

@@ -16,43 +16,44 @@
 
 package org.springframework.batch.sample.tasklet;
 
-import java.util.Properties;
-
 import org.springframework.batch.core.tasklet.Tasklet;
+import org.springframework.batch.item.StreamContext;
+import org.springframework.batch.item.StreamContextProvider;
+import org.springframework.batch.item.stream.GenericStreamContext;
 import org.springframework.batch.repeat.ExitStatus;
-import org.springframework.batch.statistics.StatisticsProvider;
 import org.springframework.batch.support.PropertiesConverter;
 
 /**
- * Simple module implementation that will always return true to indicate
- * that processing should continue.  This is useful for testing graceful
- * shutdown of jobs.
+ * Simple module implementation that will always return true to indicate that
+ * processing should continue. This is useful for testing graceful shutdown of
+ * jobs.
  * 
  * @author Lucas Ward
- *
+ * 
  */
-public class InfiniteLoopTasklet implements Tasklet, StatisticsProvider {
-	
+public class InfiniteLoopTasklet implements Tasklet, StreamContextProvider {
+
 	private int count = 0;
-	
+
 	/**
 	 * 
 	 */
 	public InfiniteLoopTasklet() {
 		super();
 	}
-	
+
 	public ExitStatus execute() throws Exception {
 		Thread.sleep(500);
 		count++;
 		return ExitStatus.CONTINUABLE;
 	}
-	
-	/* (non-Javadoc)
-	 * @see org.springframework.batch.statistics.StatisticsProvider#getStatistics()
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.batch.item.stream.ItemStreamAdapter#getStreamContext()
 	 */
-	public Properties getStatistics() {
-		return PropertiesConverter.stringToProperties("count="+count);
+	public StreamContext getStreamContext() {
+		return new GenericStreamContext(PropertiesConverter.stringToProperties("count=" + count));
 	}
 
 }

spring-batch-samples/src/main/java/org/springframework/batch/sample/tasklet/SimpleTradeTasklet.java

@@ -21,10 +21,12 @@ import java.util.Properties;
 import org.springframework.batch.core.tasklet.Tasklet;
 import org.springframework.batch.execution.tasklet.ItemOrientedTasklet;
 import org.springframework.batch.io.file.DefaultFlatFileItemReader;
+import org.springframework.batch.item.StreamContext;
+import org.springframework.batch.item.StreamContextProvider;
+import org.springframework.batch.item.stream.GenericStreamContext;
 import org.springframework.batch.repeat.ExitStatus;
 import org.springframework.batch.sample.dao.TradeDao;
 import org.springframework.batch.sample.domain.Trade;
-import org.springframework.batch.statistics.StatisticsProvider;
 
 /**
  * Simple implementation of a {@link Tasklet}, which illustrates the reading
@@ -40,7 +42,7 @@ import org.springframework.batch.statistics.StatisticsProvider;
  * @author Lucas Ward
  * @author Dave Syer
  */
-public class SimpleTradeTasklet implements Tasklet, StatisticsProvider {
+public class SimpleTradeTasklet implements Tasklet, StreamContextProvider {
 
 	/*
 	 * reads the data from input file
@@ -84,11 +86,14 @@ public class SimpleTradeTasklet implements Tasklet, StatisticsProvider {
 		this.tradeDao = tradeDao;
 	}
 
-	public Properties getStatistics() {
+	/* (non-Javadoc)
+	 * @see org.springframework.batch.item.StreamContextProvider#getStreamContext()
+	 */
+	public StreamContext getStreamContext() {
 		Properties statistics = new Properties();
 		statistics.setProperty("trade.count", String.valueOf(tradeCount));
 		statistics.putAll(inputSource.getStatistics());
-		return statistics;
+		return new GenericStreamContext(statistics);
 	}
 
 }