BAEL-2168 Java EE 7 batch processing (#5861)

* review changes

* Fixed public static count

* review comments

jee-7/src/main/java/com/baeldung/batch/understanding/CustomCheckPoint.java

@@ -1,12 +1,22 @@
 package com.baeldung.batch.understanding;
 
 import javax.batch.api.chunk.AbstractCheckpointAlgorithm;
+import javax.batch.runtime.context.JobContext;
+import javax.inject.Inject;
 import javax.inject.Named;
 
 @Named
 public class CustomCheckPoint extends AbstractCheckpointAlgorithm {
+    
+    @Inject
+    JobContext jobContext;
+    
+    private Integer counterRead = 0;
+    
     @Override
     public boolean isReadyToCheckpoint() throws Exception {
-        return SimpleChunkItemReader.COUNT % 5 == 0;
+        counterRead = (Integer)jobContext.getTransientUserData();
+        System.out.println("counterRead : " + counterRead);
+        return counterRead % 5 == 0;
     }
 }

jee-7/src/main/java/com/baeldung/batch/understanding/InjectSimpleBatchLet.java

@@ -1,20 +1,38 @@
 package com.baeldung.batch.understanding;
 
+import java.util.Properties;
+import java.util.logging.Logger;
+
 import javax.batch.api.AbstractBatchlet;
 import javax.batch.api.BatchProperty;
 import javax.batch.runtime.BatchStatus;
+import javax.batch.runtime.context.JobContext;
+import javax.batch.runtime.context.StepContext;
 import javax.inject.Inject;
 import javax.inject.Named;
 
 @Named
 public class InjectSimpleBatchLet extends AbstractBatchlet {
+    Logger logger = Logger.getLogger(InjectSimpleBatchLet.class.getName());
+
     @Inject
     @BatchProperty(name = "name")
     private String nameString;
 
+    @Inject
+    StepContext stepContext;
+    private Properties stepProperties;    
+    @Inject
+    JobContext jobContext;
+    private Properties jobProperties;
+
     @Override
     public String process() throws Exception {
-        System.out.println("Value passed in = " + nameString);
+        logger.info("BatchProperty : " + nameString);
+        stepProperties = stepContext.getProperties();
+        jobProperties = jobContext.getProperties();
+        logger.info("Step property : "+ stepProperties.getProperty("stepProp1"));
+        logger.info("job property : "+jobProperties.getProperty("jobProp1"));
         return BatchStatus.COMPLETED.toString();
     }
 }

jee-7/src/main/java/com/baeldung/batch/understanding/SimpleChunkItemReader.java

@@ -1,20 +1,28 @@
 package com.baeldung.batch.understanding;
 
 import java.io.Serializable;
+import java.util.Properties;
 import java.util.StringTokenizer;
 import javax.batch.api.chunk.AbstractItemReader;
+import javax.batch.runtime.BatchStatus;
+import javax.batch.runtime.context.JobContext;
+import javax.inject.Inject;
 import javax.inject.Named;
 
 @Named
 public class SimpleChunkItemReader extends AbstractItemReader {
     private StringTokenizer tokens;
-    public static int COUNT = 0;
+    private Integer count=0;
+    
+    @Inject
+    JobContext jobContext;
 
     @Override
     public Integer readItem() throws Exception {
         if (tokens.hasMoreTokens()) {
-            COUNT++;
+            this.count++;
             String tempTokenize = tokens.nextToken();
+            jobContext.setTransientUserData(count);
             return Integer.valueOf(tempTokenize);
         }
         return null;
@@ -24,4 +32,5 @@ public class SimpleChunkItemReader extends AbstractItemReader {
     public void open(Serializable checkpoint) throws Exception {
         tokens = new StringTokenizer("1,2,3,4,5,6,7,8,9,10", ",");
     }
+
 }

jee-7/src/main/java/com/baeldung/batch/understanding/SimpleChunkItemReaderError.java

@@ -4,17 +4,22 @@ import java.io.Serializable;
 import java.util.StringTokenizer;
 
 import javax.batch.api.chunk.AbstractItemReader;
+import javax.batch.runtime.context.JobContext;
+import javax.inject.Inject;
 import javax.inject.Named;
 
 @Named
 public class SimpleChunkItemReaderError extends AbstractItemReader {
+    @Inject 
+    JobContext jobContext;
     private StringTokenizer tokens;
-    public static int COUNT = 0;
+    private Integer count = 0;
 
     @Override
     public Integer readItem() throws Exception {
         if (tokens.hasMoreTokens()) {
-            COUNT++;
+            count++;
+            jobContext.setTransientUserData(count);
             int token = Integer.valueOf(tokens.nextToken());
             if (token == 3) {
                 throw new RuntimeException("Something happened");

jee-7/src/main/java/com/baeldung/batch/understanding/SimpleChunkWriter.java

@@ -1,5 +1,6 @@
 package com.baeldung.batch.understanding;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.batch.api.chunk.AbstractItemWriter;
@@ -7,7 +8,9 @@ import javax.inject.Named;
 
 @Named
 public class SimpleChunkWriter extends AbstractItemWriter {
+    List<Integer> processed = new ArrayList<>();
     @Override
     public void writeItems(List<Object> items) throws Exception {
+        items.stream().map(Integer.class::cast).forEach(this.processed::add);
     }
 }