BAEL-1368: infinispan article (#3633)

libraries/src/main/java/com/baeldung/infinispan/service/TransactionalService.java

@@ -0,0 +1,57 @@
+package com.baeldung.infinispan.service;
+
+import org.infinispan.Cache;
+import org.springframework.util.StopWatch;
+
+import javax.transaction.TransactionManager;
+
+public class TransactionalService {
+
+    private final Cache<String, Integer> transactionalCache;
+
+    private static final String KEY = "key";
+
+    public TransactionalService(Cache<String, Integer> transactionalCache) {
+        this.transactionalCache = transactionalCache;
+
+        transactionalCache.put(KEY, 0);
+    }
+
+    public Integer getQuickHowManyVisits() {
+        try {
+            TransactionManager tm = transactionalCache.getAdvancedCache().getTransactionManager();
+            tm.begin();
+            Integer howManyVisits = transactionalCache.get(KEY);
+            howManyVisits++;
+            System.out.println("Ill try to set HowManyVisits to " + howManyVisits);
+            StopWatch watch = new StopWatch();
+            watch.start();
+            transactionalCache.put(KEY, howManyVisits);
+            watch.stop();
+            System.out.println("I was able to set HowManyVisits to " + howManyVisits +
+              " after waiting " + watch.getTotalTimeSeconds() + " seconds");
+
+            tm.commit();
+            return howManyVisits;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return 0;
+        }
+    }
+
+    public void startBackgroundBatch() {
+        try {
+            TransactionManager tm = transactionalCache.getAdvancedCache().getTransactionManager();
+            tm.begin();
+            transactionalCache.put(KEY, 1000);
+            System.out.println("HowManyVisits should now be 1000, " +
+              "but we are holding the transaction");
+            Thread.sleep(1000L);
+            tm.rollback();
+            System.out.println("The slow batch suffered a rollback");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+}