/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.cache.infinispan.access;

import org.hibernate.cache.CacheException;
import org.hibernate.cache.infinispan.impl.BaseRegion;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.engine.spi.SharedSessionContractImplementor;

/**
 * Delegate for non-transactional caches
 *
 * @author Radim Vansa <rvansa@redhat.com>
 */
public class NonTxInvalidationCacheAccessDelegate extends InvalidationCacheAccessDelegate {
	public NonTxInvalidationCacheAccessDelegate(BaseRegion region, PutFromLoadValidator validator) {
		super(region, validator);
	}

	@Override
	@SuppressWarnings("UnusedParameters")
	public boolean insert(SharedSessionContractImplementor session, Object key, Object value, Object version) throws CacheException {
		if ( !region.checkValid() ) {
			return false;
		}

		// We need to be invalidating even for regular writes; if we were not and the write was followed by eviction
		// (or any other invalidation), naked put that was started after the eviction ended but before this insert
		// ended could insert the stale entry into the cache (since the entry was removed by eviction).
		putValidator.setCurrentSession(session);
		try {
			// NonTxInvalidationInterceptor will call beginInvalidatingWithPFER and change this to a removal because
			// we must publish the new value only after invalidation ends.
			writeCache.put(key, value);
		}
		finally {
			putValidator.resetCurrentSession();
		}
		return true;
	}

	@Override
	@SuppressWarnings("UnusedParameters")
	public boolean update(SharedSessionContractImplementor session, Object key, Object value, Object currentVersion, Object previousVersion)
			throws CacheException {
		// We update whether or not the region is valid. Other nodes
		// may have already restored the region so they need to
		// be informed of the change.

		// We need to be invalidating even for regular writes; if we were not and the write was followed by eviction
		// (or any other invalidation), naked put that was started after the eviction ended but before this update
		// ended could insert the stale entry into the cache (since the entry was removed by eviction).
		putValidator.setCurrentSession(session);
		try {
			// NonTxInvalidationInterceptor will call beginInvalidatingWithPFER and change this to a removal because
			// we must publish the new value only after invalidation ends.
			writeCache.put(key, value);
		}
		finally {
			putValidator.resetCurrentSession();
		}
		return true;
	}

	@Override
	public boolean afterInsert(SharedSessionContractImplementor session, Object key, Object value, Object version) {
		// endInvalidatingKeys is called from NonTxInvalidationInterceptor, from the synchronization callback
		return false;
	}

	@Override
	public boolean afterUpdate(SharedSessionContractImplementor session, Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock) {
		// endInvalidatingKeys is called from NonTxInvalidationInterceptor, from the synchronization callback
		return false;
	}
}