org.springframework.data.gemfire.GemfireTemplate Maven / Gradle / Ivy
/*
* Copyright 2010-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.data.gemfire;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Collection;
import java.util.Map;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.InvalidDataAccessApiUsageException;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import com.gemstone.gemfire.GemFireCheckedException;
import com.gemstone.gemfire.GemFireException;
import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.Scope;
import com.gemstone.gemfire.cache.client.ClientCache;
import com.gemstone.gemfire.cache.query.IndexInvalidException;
import com.gemstone.gemfire.cache.query.Query;
import com.gemstone.gemfire.cache.query.QueryInvalidException;
import com.gemstone.gemfire.cache.query.QueryService;
import com.gemstone.gemfire.cache.query.SelectResults;
import com.gemstone.gemfire.internal.cache.LocalRegion;
/**
* Helper class that simplifies GemFire data access code and converts {@link GemFireCheckedException} and
* {@link GemFireException} into Spring {@link DataAccessException}, following the org.springframework.dao
* exception hierarchy.
*
* The central method is execute, supporting GemFire access code implementing the GemfireCallback interface.
* It provides dedicated handling such that neither the GemfireCallback implementation nor the calling code needs to
* explicitly care about handling {@link Region} life-cycle exceptions.
* Typically used to implement data access or business logic services that use GemFire within their implementation but
* are GemFire-agnostic in their interface. The latter or code calling the latter only have to deal with business
* objects, query objects, and org.springframework.dao exceptions.
*
* @author Costin Leau
* @author John Blum
* @see java.util.Map
* @see org.springframework.data.gemfire.GemfireAccessor
* @see org.springframework.data.gemfire.GemfireOperations
* @see com.gemstone.gemfire.cache.Region
* @see com.gemstone.gemfire.cache.query.Query
* @see com.gemstone.gemfire.cache.query.QueryService
* @see com.gemstone.gemfire.cache.query.SelectResults
*/
@SuppressWarnings("unused")
public class GemfireTemplate extends GemfireAccessor implements GemfireOperations {
private boolean exposeNativeRegion = false;
private Region regionProxy;
public GemfireTemplate() {
}
public GemfireTemplate(Region region) {
setRegion(region);
afterPropertiesSet();
}
@Override
public void afterPropertiesSet() {
super.afterPropertiesSet();
regionProxy = createRegionProxy(getRegion());
}
/**
* Sets whether to expose the native Gemfire Region to GemfireCallback code. Default is "false": a Region proxy
* will be returned, suppressing close calls.
* As there is often a need to cast to a interface, the exposed proxy implements all interfaces
* implemented by the original {@link Region}. If this is not sufficient, turn this flag to "true".
*
* @param exposeNativeRegion a boolean value to indicate whether the native GemFire Cache Region should be exposed
* to the GemfireCallback.
* @see org.springframework.data.gemfire.GemfireCallback
*/
public void setExposeNativeRegion(boolean exposeNativeRegion) {
this.exposeNativeRegion = exposeNativeRegion;
}
/**
* Returns whether to expose the native GemFire Cache Region or a Region proxy to the GemfireCallback code.
*
* @return a boolean value indicating whether the native GemFire Cache Region or Region proxy is exposed
* to the GemfireCallback code.
*/
public boolean isExposeNativeRegion() {
return this.exposeNativeRegion;
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#containsKey(java.lang.Object)
*/
@Override
public boolean containsKey(final Object key) {
return getRegion().containsKey(key);
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#containsKeyOnServer(java.lang.Object)
*/
@Override
public boolean containsKeyOnServer(final Object key) {
return getRegion().containsKeyOnServer(key);
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#containsValue(java.lang.Object)
*/
@Override
public boolean containsValue(final Object value) {
return getRegion().containsValue(value);
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#containsValueForKey(java.lang.Object)
*/
@Override
public boolean containsValueForKey(final Object key) {
return getRegion().containsValueForKey(key);
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#create(K, V)
*/
@Override
public void create(final K key, final V value) {
try {
getRegion().create(key, value);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#get(K)
*/
@Override
public V get(final K key) {
try {
return this.getRegion().get(key);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#getAll(java.util.Collection)
*/
@Override
public Map getAll(final Collection keys) {
try {
return this.getRegion().getAll(keys);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#put(K, V)
*/
@Override
public V put(final K key, final V value) {
try {
return this.getRegion().put(key, value);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#putAll(java.util.Map)
*/
@Override
public void putAll(final Map map) {
try {
this.getRegion().putAll(map);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#putIfAbsent(K, V)
*/
@Override
public V putIfAbsent(final K key, final V value) {
try {
return this.getRegion().putIfAbsent(key, value);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#remove(K)
*/
@Override
public V remove(final K key) {
try {
return this.getRegion().remove(key);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#replace(K, V)
*/
@Override
public V replace(final K key, final V value) {
try {
return this.getRegion().replace(key, value);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#replace(K, V, V)
*/
@Override
public boolean replace(final K key, final V oldValue, final V newValue) {
try {
return this.getRegion().replace(key, oldValue, newValue);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#query(java.lang.String)
*/
@Override
public SelectResults query(final String query) {
try {
return this.getRegion().query(query);
}
catch (IndexInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (QueryInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (GemFireCheckedException e) {
throw convertGemFireAccessException(e);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
catch (RuntimeException ex) {
// test for CqInvalidException (removed in 6.5)
if (GemfireCacheUtils.isCqInvalidException(ex)) {
throw GemfireCacheUtils.convertCqInvalidException(ex);
}
// callback code threw application exception
throw ex;
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#find(java.lang.String, java.lang.Object)
*/
@Override
@SuppressWarnings("unchecked")
public SelectResults find(final String queryString, final Object... params) throws InvalidDataAccessApiUsageException {
try {
QueryService queryService = lookupQueryService(getRegion());
Query query = queryService.newQuery(queryString);
Object result = query.execute(params);
if (result instanceof SelectResults) {
return (SelectResults) result;
}
else {
throw new InvalidDataAccessApiUsageException(
"Result object returned from GemfireCallback isn't a SelectResult: [" + result + "]");
}
}
catch (IndexInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (QueryInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (GemFireCheckedException e) {
throw convertGemFireAccessException(e);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
catch (RuntimeException ex) {
// test for CqInvalidException (removed in 6.5)
if (GemfireCacheUtils.isCqInvalidException(ex)) {
throw GemfireCacheUtils.convertCqInvalidException(ex);
}
// callback code threw application exception
throw ex;
}
}
/* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#findUnique(java.lang.String, java.lang.Object)
*/
@Override
@SuppressWarnings("unchecked")
public T findUnique(final String queryString, final Object... params) throws InvalidDataAccessApiUsageException {
try {
QueryService queryService = lookupQueryService(getRegion());
Query query = queryService.newQuery(queryString);
Object result = query.execute(params);
if (result instanceof SelectResults) {
SelectResults selectResults = (SelectResults) result;
if (selectResults.asList().size() == 1) {
result = selectResults.iterator().next();
}
else {
throw new InvalidDataAccessApiUsageException(String.format(
"The result returned from query (%1$s) is not unique: (%2$s).", queryString, result));
}
}
return (T) result;
}
catch (IndexInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (QueryInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (GemFireCheckedException e) {
throw convertGemFireAccessException(e);
}
catch (GemFireException e) {
throw convertGemFireAccessException(e);
}
catch (RuntimeException ex) {
// test for CqInvalidException (removed in 6.5)
if (GemfireCacheUtils.isCqInvalidException(ex)) {
throw GemfireCacheUtils.convertCqInvalidException(ex);
}
// callback code threw application exception
throw ex;
}
}
/**
* Returns the query service used by the template in its find methods.
*
* @param region region to find the local query service from
* @return query service to use, local or generic
* @see com.gemstone.gemfire.cache.Region
* @see com.gemstone.gemfire.cache.Region#getRegionService()
* @see com.gemstone.gemfire.cache.RegionService#getQueryService()
* @see com.gemstone.gemfire.cache.client.ClientCache#getLocalQueryService()
*/
protected QueryService lookupQueryService(final Region region) {
return (requiresLocalQueryService(region) ? ((ClientCache) region.getRegionService()).getLocalQueryService()
: region.getRegionService().getQueryService());
}
/*
* (non-Javadoc)
* @see com.gemstone.gemfire.cache.Region
* @see com.gemstone.gemfire.internal.cache.LocalRegion
*/
/* package-private */ boolean isLocalWithNoServerProxy(final Region region) {
return (region instanceof LocalRegion && !((LocalRegion) region).hasServerProxy());
}
/*
* (non-Javadoc)
* @see #isLocalWithNoServerProxy(:Region)
* @see com.gemstone.gemfire.cache.Region
* @see com.gemstone.gemfire.cache.RegionAttributes
* @see com.gemstone.gemfire.cache.RegionAttributes#getScope()
* @see com.gemstone.gemfire.cache.Scope
* @see com.gemstone.gemfire.cache.client.ClientCache
* @see com.gemstone.gemfire.internal.cache.LocalRegion
* @see com.gemstone.gemfire.internal.cache.LocalRegion#hasServerProxy()
*/
private boolean requiresLocalQueryService(final Region region) {
return (region.getRegionService() instanceof ClientCache && isLocalWithNoServerProxy(region)
&& Scope.LOCAL.equals(region.getAttributes().getScope()));
}
/*
* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#execute(org.springframework.data.gemfire.GemfireCallback)
*/
@Override
public T execute(GemfireCallback action) throws DataAccessException {
return execute(action, isExposeNativeRegion());
}
/*
* (non-Javadoc)
* @see org.springframework.data.gemfire.GemfireOperations#execute(org.springframework.data.gemfire.GemfireCallback, boolean)
*/
@Override
public T execute(GemfireCallback action, boolean exposeNativeRegion) throws DataAccessException {
Assert.notNull(action, "Callback object must not be null");
try {
Region regionToExpose = (exposeNativeRegion ? getRegion() : regionProxy);
return action.doInGemfire(regionToExpose);
}
catch (IndexInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (QueryInvalidException ex) {
throw convertGemFireQueryException(ex);
}
catch (GemFireCheckedException ex) {
throw convertGemFireAccessException(ex);
}
catch (GemFireException ex) {
throw convertGemFireAccessException(ex);
}
catch (RuntimeException ex) {
// test for CqInvalidException (removed in 6.5)
if (GemfireCacheUtils.isCqInvalidException(ex)) {
throw GemfireCacheUtils.convertCqInvalidException(ex);
}
// callback code threw application exception
throw ex;
}
}
/**
* Create a close-suppressing proxy for the given GemFire Cache {@link Region}.
* Called by the execute method.
*
* @param the Region key class type.
* @param the Region value class type.
* @param region the GemFire Cache Region to create a proxy for.
* @return the Region proxy implementing all interfaces implemented by the passed-in Region object.
* @see com.gemstone.gemfire.cache.Region#close()
* @see #execute(GemfireCallback, boolean)
*/
@SuppressWarnings("unchecked")
protected Region createRegionProxy(final Region region) {
return (Region) Proxy.newProxyInstance(region.getClass().getClassLoader(),
ClassUtils.getAllInterfacesForClass(region.getClass(), getClass().getClassLoader()),
new RegionCloseSuppressingInvocationHandler(region));
}
/**
* InvocationHandler that suppresses close calls on GemFire Cache Regions.
*
* @see com.gemstone.gemfire.cache.Region#close()
* @see java.lang.reflect.InvocationHandler
*/
private static class RegionCloseSuppressingInvocationHandler implements InvocationHandler {
private final Region target;
public RegionCloseSuppressingInvocationHandler(final Region target) {
Assert.notNull(target, "The Region to target must not be null.");
this.target = target;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (method.getName().equals("equals")) {
// only consider equal when proxies are identical
return (proxy == args[0]);
}
else if (method.getName().equals("hashCode")) {
// use hashCode of Region proxy
return System.identityHashCode(proxy);
}
else if (method.getName().equals("close")) {
// suppress Region.close() method call
return null;
}
else {
try {
return method.invoke(this.target, args);
}
catch (InvocationTargetException ex) {
throw ex.getTargetException();
}
}
}
}
}