IGNITE-891 - Cache store improvements

modules/core/src/main/java/org/apache/ignite/cache/store/CacheStoreSessionListener.java

@@ -18,10 +18,21 @@
 package org.apache.ignite.cache.store;
 
 /**
- * TODO
+ * Store session listener.
  */
 public interface CacheStoreSessionListener {
+    /**
+     * On session start callback.
+     *
+     * @param ses Current session.
+     */
     public void onSessionStart(CacheStoreSession ses);
 
+    /**
+     * On session end callback.
+     *
+     * @param ses Current session.
+     * @param commit {@code True} if transaction should commit, {@code false} for rollback.
+     */
     public void onSessionEnd(CacheStoreSession ses, boolean commit);
 }

modules/core/src/main/java/org/apache/ignite/cache/store/jdbc/CacheStoreSessionJdbcListener.java

@@ -27,7 +27,7 @@
 import java.util.*;
 
 /**
- * TODO
+ * Cache store session listener based on JDBC connection.
  */
 public class CacheStoreSessionJdbcListener implements CacheStoreSessionListener {
     /** Session key for JDBC connection. */

modules/hibernate/src/main/java/org/apache/ignite/cache/store/hibernate/CacheStoreSessionHibernateListener.java

@@ -26,7 +26,7 @@
 import java.util.*;
 
 /**
- * TODO
+ * Cache store session listener based on Hibernate session.
  */
 public class CacheStoreSessionHibernateListener implements CacheStoreSessionListener {
     /** Session key for JDBC connection. */

modules/spring/src/main/java/org/apache/ignite/cache/store/spring/CacheStoreSessionSpringListener.java

@@ -26,7 +26,7 @@
 import javax.cache.integration.*;
 
 /**
- * TODO
+ * Cache store session listener based on Spring cache manager.
  */
 public class CacheStoreSessionSpringListener implements CacheStoreSessionListener {
     /** Session key for transaction status. */