package org.springframework.data.gemfire.repository.support;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.springframework.data.domain.Sort;
import org.springframework.data.gemfire.GemfireCallback;
import org.springframework.data.gemfire.GemfireTemplate;
import org.springframework.data.gemfire.repository.GemfireRepository;
import org.springframework.data.gemfire.repository.Wrapper;
import org.springframework.data.gemfire.repository.query.QueryString;
import org.springframework.data.repository.core.EntityInformation;
import org.springframework.util.Assert;
import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.query.SelectResults;
/**
* Basic Repository implementation for GemFire.
*
* @author Oliver Gierke
* @author David Turanski
* @author John Blum
* @see java.io.Serializable
* @see org.springframework.data.gemfire.GemfireTemplate
* @see org.springframework.data.gemfire.repository.GemfireRepository
* @see com.gemstone.gemfire.cache.Region
*/
public class SimpleGemfireRepository<T, ID extends Serializable> implements GemfireRepository<T, ID> {
private final GemfireTemplate template;
private final EntityInformation<T, ID> entityInformation;
/**
* Creates a new {@link SimpleGemfireRepository}.
*
* @param template must not be {@literal null}.
* @param entityInformation must not be {@literal null}.
*/
public SimpleGemfireRepository(GemfireTemplate template, EntityInformation<T, ID> entityInformation) {
Assert.notNull(template);
Assert.notNull(entityInformation);
this.template = template;
this.entityInformation = entityInformation;
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#save(S)
*/
@Override
public <U extends T> U save(U entity) {
template.put(entityInformation.getId(entity), entity);
return entity;
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#save(java.lang.Iterable)
*/
@Override
public <U extends T> Iterable<U> save(Iterable<U> entities) {
Map<ID, U> result = new HashMap<ID, U>();
for (U entity : entities) {
result.put(entityInformation.getId(entity), entity);
}
template.putAll(result);
return result.values();
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.data.gemfire.repository.GemfireRepository#save(
* org.springframework.data.gemfire.repository.Wrapper)
*/
@Override
public T save(Wrapper<T, ID> wrapper) {
return template.put(wrapper.getKey(), wrapper.getEntity());
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#count()
*/
@Override
public long count() {
SelectResults<Integer> results = template.find("SELECT count(*) FROM " + template.getRegion().getFullPath());
return (long) results.iterator().next();
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#exists(java.io.Serializable)
*/
@Override
public boolean exists(ID id) {
return (findOne(id) != null);
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#findOne(java.io.Serializable)
*/
@Override
@SuppressWarnings("unchecked")
public T findOne(ID id) {
return (T) template.get(id);
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#findAll()
*/
@Override
public Collection<T> findAll() {
SelectResults<T> results = template.find("SELECT * FROM " + template.getRegion().getFullPath());
return results.asList();
}
/*
* (non-Javadoc)
* @see org.springframework.data.gemfire.repository.GemfireRepository.sort(:org.springframework.data.domain.Sort)
*/
@Override
public Iterable<T> findAll(final Sort sort) {
QueryString query = new QueryString("SELECT * FROM /RegionPlaceholder")
.forRegion(entityInformation.getJavaType(), template.getRegion())
.orderBy(sort);
SelectResults<T> selectResults = template.find(query.toString());
return selectResults.asList();
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#findAll(java.lang.Iterable)
*/
@Override
@SuppressWarnings("unchecked")
public Collection<T> findAll(Iterable<ID> ids) {
List<ID> parameters = new ArrayList<ID>();
for (ID id : ids) {
parameters.add(id);
}
return (Collection<T>) template.getAll(parameters).values();
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#delete(java.io.Serializable)
*/
@Override
public void delete(ID id) {
template.remove(id);
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.data.repository.CrudRepository#delete(java.lang.Object)
*/
@Override
public void delete(T entity) {
delete(entityInformation.getId(entity));
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.data.repository.CrudRepository#delete(java.lang.Iterable)
*/
@Override
public void delete(Iterable<? extends T> entities) {
for (T entity : entities) {
delete(entity);
}
}
/*
* (non-Javadoc)
*
* @see org.springframework.data.repository.CrudRepository#deleteAll()
*/
@Override
public void deleteAll() {
template.execute(new GemfireCallback<Void>() {
@Override
@SuppressWarnings("rawtypes")
public Void doInGemfire(Region region) {
//clear() does not work for partitioned regions
try {
region.clear();
}
catch (UnsupportedOperationException e) {
for (Object key : region.keySet()) {
region.remove(key);
}
}
return null;
}
});
}
}