DATACOUCH-59 - Allow expiry touch on read

Configuration is based on Document annotation. When read of document takes place then touch action is executed on document. It is an asynchronous action so it does not block read. It is executed only on single reads (not view-based or N1QL-based ones).

src/test/java/org/springframework/data/couchbase/core/mapping/BasicCouchbasePersistentEntityTests.java

@@ -17,6 +17,8 @@
 package org.springframework.data.couchbase.core.mapping;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 import java.util.Calendar;
 import java.util.Date;
@@ -103,6 +105,42 @@ public class BasicCouchbasePersistentEntityTests {
     assertEquals(expected.get(Calendar.SECOND), calendar.get(Calendar.SECOND));
   }
 
+  @Test
+  public void doesNotUseGetExpiry() throws Exception {
+    assertEquals(0, getBasicCouchbasePersistentEntity(SimpleDocument.class).getExpiry());
+  }
+
+  @Test
+  public void usesGetExpiry() throws Exception {
+    assertEquals(10, getBasicCouchbasePersistentEntity(SimpleDocumentWithExpiry.class).getExpiry());
+  }
+
+  @Test
+  public void doesNotUseIsUpdateExpiryForRead() throws Exception {
+    assertFalse(getBasicCouchbasePersistentEntity(SimpleDocument.class).isTouchOnRead());
+    assertFalse(getBasicCouchbasePersistentEntity(SimpleDocumentWithExpiry.class).isTouchOnRead());
+    }
+
+  @Test
+  public void usesTouchOnRead() throws Exception {
+    assertTrue(getBasicCouchbasePersistentEntity(SimpleDocumentWithTouchOnRead.class).isTouchOnRead());
+  }
+
+  private BasicCouchbasePersistentEntity getBasicCouchbasePersistentEntity(Class<?> clazz) {
+    return new BasicCouchbasePersistentEntity(ClassTypeInformation.from(clazz));
+  }
+
+  public static class SimpleDocument {
+  }
+
+  @Document(expiry = 10)
+  public static class SimpleDocumentWithExpiry {
+  }
+
+  @Document(expiry = 10, touchOnRead = true)
+  public static class SimpleDocumentWithTouchOnRead {
+  }
+
   /**
    * Simple POJO to test default expiry.
    */