/*
* Copyright DataStax, Inc.
*
* 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 com.datastax.oss.driver.internal.core.cql;
import com.datastax.oss.driver.api.core.cql.PrepareRequest;
import com.datastax.oss.driver.api.core.cql.PreparedStatement;
import com.datastax.oss.driver.api.core.session.Request;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import com.datastax.oss.driver.internal.core.context.InternalDriverContext;
import com.datastax.oss.driver.internal.core.session.DefaultSession;
import com.datastax.oss.driver.internal.core.session.RequestProcessor;
import com.datastax.oss.driver.internal.core.util.concurrent.BlockingOperation;
import com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures;
import com.datastax.oss.driver.shaded.guava.common.cache.Cache;
import java.util.concurrent.CompletableFuture;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public class CqlPrepareSyncProcessor
implements RequestProcessor<PrepareRequest, PreparedStatement> {
private final CqlPrepareAsyncProcessor asyncProcessor;
Note: if you also register a CqlPrepareAsyncProcessor
with your session, make sure that you pass that same instance to this constructor. This is necessary for proper behavior of the prepared statement cache. /**
* Note: if you also register a {@link CqlPrepareAsyncProcessor} with your session, make sure that
* you pass that same instance to this constructor. This is necessary for proper behavior of the
* prepared statement cache.
*/
public CqlPrepareSyncProcessor(CqlPrepareAsyncProcessor asyncProcessor) {
this.asyncProcessor = asyncProcessor;
}
@Override
public boolean canProcess(Request request, GenericType<?> resultType) {
return request instanceof PrepareRequest && resultType.equals(PrepareRequest.SYNC);
}
@Override
public PreparedStatement process(
PrepareRequest request,
DefaultSession session,
InternalDriverContext context,
String sessionLogPrefix) {
BlockingOperation.checkNotDriverThread();
return CompletableFutures.getUninterruptibly(
asyncProcessor.process(request, session, context, sessionLogPrefix));
}
public Cache<PrepareRequest, CompletableFuture<PreparedStatement>> getCache() {
return asyncProcessor.getCache();
}
@Override
public PreparedStatement newFailure(RuntimeException error) {
throw error;
}
}