refs #200: Create accouting-lib library

https://support.d4science.org/issues/200
Implementing buffer strategy

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/accounting/accounting-lib@115632 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/accounting/datamodel/aggregation/scheduler/AggregationScheduler.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.gcube.accounting.datamodel.UsageRecord;
+import org.gcube.accounting.persistence.PersistenceExecutor;
 
 /**
  * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
@@ -28,13 +29,13 @@ public abstract class AggregationScheduler {
 	public List<UsageRecord> getRecords() {
 		return records;
 	}
-
+	
 	protected AggregationScheduler(){
 		this.records = new ArrayList<UsageRecord>();
 	}
 	
 	protected void madeAggregation(UsageRecord UsageRecord){
-		// TODO
+		
 	}
 	
 	/**
@@ -42,10 +43,14 @@ public abstract class AggregationScheduler {
 	 * Usage Record.
 	 * @param usageRecord the Usage Record To Buffer
 	 * @return true if is time to persist the buffered Usage Record
+	 * @throws Exception if fails
 	 */
-	public synchronized boolean aggregate(UsageRecord UsageRecord) {
+	public synchronized void aggregate(UsageRecord UsageRecord, PersistenceExecutor persistenceExecutor) throws Exception {
 		madeAggregation(UsageRecord);
-		return isTimeToPersist();
+		if(isTimeToPersist()){
+			persistenceExecutor.persist(records.toArray(new UsageRecord[records.size()]));
+		}
+		
 	}
 	
 	

src/main/java/org/gcube/accounting/datamodel/aggregation/scheduler/BufferAggregationScheduler.java

@@ -40,7 +40,7 @@ public class BufferAggregationScheduler extends AggregationScheduler {
 	 * {@inheritDoc}
 	 */
 	@Override
-	public synchronized boolean isTimeToPersist(){
+	public boolean isTimeToPersist(){
 		long now = Calendar.getInstance().getTimeInMillis();
 		
 		if(firstOfBuffer){

src/main/java/org/gcube/accounting/persistence/Persistence.java

@@ -4,7 +4,6 @@
 package org.gcube.accounting.persistence;
 
 import java.io.File;
-import java.util.List;
 import java.util.ServiceLoader;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -129,27 +128,26 @@ public abstract class Persistence {
 	 * This method contains the code to save the {@link #UsageRecord}
 	 * 
 	 */
-	protected abstract void reallyAccount(UsageRecord usageRecord) throws Exception;
+	protected abstract void reallyAccount(UsageRecord usageRecords) throws Exception;
 	
-	
-	
-	private void accountWithFallback(UsageRecord usageRecord) throws Exception {
+	private void accountWithFallback(UsageRecord... usageRecords) {
 		String persistenceName = getInstance().getClass().getSimpleName();
-		try {
-			//logger.debug("Going to account {} using {}", usageRecord, persistenceName);
-			persistence.reallyAccount(usageRecord);
-			logger.debug("{} accounted succesfully from {}.", usageRecord, persistenceName);
-		} catch (Exception e) {
-			String fallabackPersistenceName = fallback.getClass().getSimpleName();
+		for(UsageRecord usageRecord : usageRecords){
 			try {
-				logger.error("{} was not accounted succesfully from {}. Trying to use {}.", 
-						usageRecord, persistenceName, fallabackPersistenceName);
-				fallback.reallyAccount(usageRecord);
-				logger.debug("{} accounted succesfully from {}", 
-						usageRecord, fallabackPersistenceName);
-			}catch(Exception ex){
-				logger.error("{} was not accounted at all", usageRecord);
-				throw e;
+				//logger.debug("Going to account {} using {}", usageRecord, persistenceName);
+				persistence.reallyAccount(usageRecord);
+				logger.debug("{} accounted succesfully from {}.", usageRecord.toString(), persistenceName);
+			} catch (Exception e) {
+				String fallabackPersistenceName = fallback.getClass().getSimpleName();
+				try {
+					logger.error("{} was not accounted succesfully from {}. Trying to use {}.", 
+							usageRecord.toString(), persistenceName, fallabackPersistenceName);
+					fallback.reallyAccount(usageRecord);
+					logger.debug("{} accounted succesfully from {}", 
+							usageRecord.toString(), fallabackPersistenceName);
+				}catch(Exception ex){
+					logger.error("{} was not accounted at all", usageRecord.toString());
+				}
 			}
 		}
 	}
@@ -169,13 +167,16 @@ public abstract class Persistence {
 			public void run(){
 				try {
 					usageRecord.validate();
-					boolean timeToPersist = aggregationScheduler.aggregate(usageRecord);
-					if(timeToPersist){
-						List<UsageRecord> records = aggregationScheduler.getRecords();
-						for(UsageRecord record : records){
-							persistence.accountWithFallback(record);
+					aggregationScheduler.aggregate(usageRecord, new PersistenceExecutor(){
+
+						@Override
+						public void persist(UsageRecord... usageRecords) throws Exception {
+							persistence.accountWithFallback(usageRecords);	
 						}
-					}
+						
+					});
+					
+					
 				} catch (InvalidValueException e) {
 					logger.error("Error validating UsageRecord", e.getCause());
 				} catch (Exception e) {

src/main/java/org/gcube/accounting/persistence/PersistenceExecutor.java

@@ -0,0 +1,16 @@
+/**
+ * 
+ */
+package org.gcube.accounting.persistence;
+
+import org.gcube.accounting.datamodel.UsageRecord;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public interface PersistenceExecutor {
+
+	public void persist(UsageRecord... usageRecords)throws Exception;
+	
+}