/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.epl.agg.service;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.agg.access.AggregationAccessorSlotPair;
import com.espertech.esper.epl.agg.access.AggregationAgent;
import com.espertech.esper.epl.agg.access.AggregationState;
import com.espertech.esper.epl.agg.aggregator.AggregationMethod;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.core.ExprNode;
import com.espertech.esper.epl.table.mgmt.TableColumnMethodPair;
import com.espertech.esper.epl.table.mgmt.TableStateInstanceUngrouped;
import com.espertech.esper.epl.table.strategy.ExprTableEvalLockUtil;
import com.espertech.esper.epl.table.strategy.ExprTableEvalStrategyUtil;
import com.espertech.esper.event.ObjectArrayBackedEventBean;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import java.util.Collection;
/**
* Implementation for handling aggregation without any grouping (no group-by).
*/
public class AggSvcGroupAllMixedAccessWTableImpl implements AggregationService {
private final TableStateInstanceUngrouped tableStateInstance;
private final TableColumnMethodPair[] methodPairs;
private final AggregationAccessorSlotPair[] accessors;
private final int[] targetStates;
private final ExprNode[] accessStateExpr;
private final AggregationAgent[] agents;
public AggSvcGroupAllMixedAccessWTableImpl(TableStateInstanceUngrouped tableStateInstance, TableColumnMethodPair[] methodPairs, AggregationAccessorSlotPair[] accessors, int[] targetStates, ExprNode[] accessStateExpr, AggregationAgent[] agents) {
this.tableStateInstance = tableStateInstance;
this.methodPairs = methodPairs;
this.accessors = accessors;
this.targetStates = targetStates;
this.accessStateExpr = accessStateExpr;
this.agents = agents;
}
public void applyEnter(EventBean[] eventsPerStream, Object optionalGroupKeyPerRow, ExprEvaluatorContext exprEvaluatorContext) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), exprEvaluatorContext);
ObjectArrayBackedEventBean event = tableStateInstance.getCreateRowIntoTable(null, exprEvaluatorContext);
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggregationUngroupedApplyEnterLeave(true, row.getMethods().length, row.getStates().length);
}
for (int i = 0; i < methodPairs.length; i++) {
TableColumnMethodPair methodPair = methodPairs[i];
AggregationMethod method = row.getMethods()[methodPair.getTargetIndex()];
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggNoAccessEnterLeave(true, i, method, methodPair.getAggregationNode());
}
Object columnResult = methodPair.getEvaluator().evaluate(eventsPerStream, true, exprEvaluatorContext);
method.enter(columnResult);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggNoAccessEnterLeave(true, i, method);
}
}
for (int i = 0; i < targetStates.length; i++) {
AggregationState state = row.getStates()[targetStates[i]];
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggAccessEnterLeave(true, i, state, accessStateExpr[i]);
}
agents[i].applyEnter(eventsPerStream, exprEvaluatorContext, state);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggAccessEnterLeave(true, i, state);
}
}
tableStateInstance.handleRowUpdated(event);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggregationUngroupedApplyEnterLeave(true);
}
}
public void applyLeave(EventBean[] eventsPerStream, Object optionalGroupKeyPerRow, ExprEvaluatorContext exprEvaluatorContext) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), exprEvaluatorContext);
ObjectArrayBackedEventBean event = tableStateInstance.getCreateRowIntoTable(null, exprEvaluatorContext);
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggregationUngroupedApplyEnterLeave(false, row.getMethods().length, row.getStates().length);
}
for (int i = 0; i < methodPairs.length; i++) {
TableColumnMethodPair methodPair = methodPairs[i];
AggregationMethod method = row.getMethods()[methodPair.getTargetIndex()];
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggNoAccessEnterLeave(false, i, method, methodPair.getAggregationNode());
}
Object columnResult = methodPair.getEvaluator().evaluate(eventsPerStream, false, exprEvaluatorContext);
method.leave(columnResult);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggNoAccessEnterLeave(false, i, method);
}
}
for (int i = 0; i < targetStates.length; i++) {
AggregationState state = row.getStates()[targetStates[i]];
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qAggAccessEnterLeave(false, i, state, accessStateExpr[i]);
}
agents[i].applyLeave(eventsPerStream, exprEvaluatorContext, state);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggAccessEnterLeave(false, i, state);
}
}
tableStateInstance.handleRowUpdated(event);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aAggregationUngroupedApplyEnterLeave(false);
}
}
public void setCurrentAccess(Object groupKey, int agentInstanceId, AggregationGroupByRollupLevel rollupLevel) {
// no action needed - this implementation does not group and the current row is the single group
}
public Object getValue(int column, int agentInstanceId, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), exprEvaluatorContext);
ObjectArrayBackedEventBean event = tableStateInstance.getEventUngrouped();
if (event == null) {
return null;
}
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
AggregationMethod[] aggregators = row.getMethods();
if (column < aggregators.length) {
return aggregators[column].getValue();
} else {
AggregationAccessorSlotPair pair = accessors[column - aggregators.length];
return pair.getAccessor().getValue(row.getStates()[pair.getSlot()], eventsPerStream, isNewData, exprEvaluatorContext);
}
}
public Collection<EventBean> getCollectionOfEvents(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), context);
ObjectArrayBackedEventBean event = tableStateInstance.getEventUngrouped();
if (event == null) {
return null;
}
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
AggregationMethod[] aggregators = row.getMethods();
if (column < aggregators.length) {
return null;
} else {
AggregationAccessorSlotPair pair = accessors[column - aggregators.length];
return pair.getAccessor().getEnumerableEvents(row.getStates()[pair.getSlot()], eventsPerStream, isNewData, context);
}
}
public Collection<Object> getCollectionScalar(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), context);
ObjectArrayBackedEventBean event = tableStateInstance.getEventUngrouped();
if (event == null) {
return null;
}
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
AggregationMethod[] aggregators = row.getMethods();
if (column < aggregators.length) {
return null;
} else {
AggregationAccessorSlotPair pair = accessors[column - aggregators.length];
return pair.getAccessor().getEnumerableScalar(row.getStates()[pair.getSlot()], eventsPerStream, isNewData, context);
}
}
public EventBean getEventBean(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), context);
ObjectArrayBackedEventBean event = tableStateInstance.getEventUngrouped();
if (event == null) {
return null;
}
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
AggregationMethod[] aggregators = row.getMethods();
if (column < aggregators.length) {
return null;
} else {
AggregationAccessorSlotPair pair = accessors[column - aggregators.length];
return pair.getAccessor().getEnumerableEvent(row.getStates()[pair.getSlot()], eventsPerStream, isNewData, context);
}
}
public void clearResults(ExprEvaluatorContext exprEvaluatorContext) {
// acquire table-level write lock
ExprTableEvalLockUtil.obtainLockUnless(tableStateInstance.getTableLevelRWLock().writeLock(), exprEvaluatorContext);
ObjectArrayBackedEventBean event = tableStateInstance.getEventUngrouped();
if (event == null) {
return;
}
AggregationRowPair row = ExprTableEvalStrategyUtil.getRow(event);
AggregationMethod[] aggregators = row.getMethods();
for (AggregationState state : row.getStates()) {
state.clear();
}
for (AggregationMethod aggregator : aggregators) {
aggregator.clear();
}
}
public void setRemovedCallback(AggregationRowRemovedCallback callback) {
// not applicable
}
public void accept(AggregationServiceVisitor visitor) {
// not applicable
}
public void acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor) {
}
public boolean isGrouped() {
return false;
}
public Object getGroupKey(int agentInstanceId) {
return null;
}
public Collection<Object> getGroupKeys(ExprEvaluatorContext exprEvaluatorContext) {
return null;
}
public void stop() {
}
public AggregationService getContextPartitionAggregationService(int agentInstanceId) {
return this;
}
}