package com.datastax.dse.driver.internal.core.graph;
import com.datastax.dse.driver.api.core.graph.AsyncGraphResultSet;
import com.datastax.dse.driver.api.core.graph.BatchGraphStatement;
import com.datastax.dse.driver.api.core.graph.FluentGraphStatement;
import com.datastax.dse.driver.api.core.graph.GraphStatement;
import com.datastax.dse.driver.api.core.graph.ScriptGraphStatement;
import com.datastax.dse.driver.internal.core.graph.binary.GraphBinaryModule;
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.DefaultDriverContext;
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.CompletableFutures;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.concurrent.CompletionStage;
import net.jcip.annotations.ThreadSafe;
import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader;
import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter;
import org.apache.tinkerpop.gremlin.structure.io.binary.TypeSerializerRegistry;
@ThreadSafe
public class GraphRequestAsyncProcessor
implements RequestProcessor<GraphStatement<?>, CompletionStage<AsyncGraphResultSet>> {
private final GraphBinaryModule graphBinaryModule;
private final GraphSupportChecker graphSupportChecker;
public GraphRequestAsyncProcessor(
DefaultDriverContext context, GraphSupportChecker graphSupportChecker) {
TypeSerializerRegistry typeSerializerRegistry =
GraphBinaryModule.createDseTypeSerializerRegistry(context);
this.graphBinaryModule =
new GraphBinaryModule(
new GraphBinaryReader(typeSerializerRegistry),
new GraphBinaryWriter(typeSerializerRegistry));
this.graphSupportChecker = graphSupportChecker;
}
@NonNull
public GraphBinaryModule getGraphBinaryModule() {
return graphBinaryModule;
}
@Override
public boolean canProcess(Request request, GenericType<?> resultType) {
return (request instanceof ScriptGraphStatement
|| request instanceof FluentGraphStatement
|| request instanceof BatchGraphStatement
|| request instanceof BytecodeGraphStatement)
&& resultType.equals(GraphStatement.ASYNC);
}
@Override
public CompletionStage<AsyncGraphResultSet> process(
GraphStatement<?> request,
DefaultSession session,
InternalDriverContext context,
String sessionLogPrefix) {
if (graphSupportChecker.isPagingEnabled(request, context)) {
return new ContinuousGraphRequestHandler(
request,
session,
context,
sessionLogPrefix,
getGraphBinaryModule(),
graphSupportChecker)
.handle();
} else {
return new GraphRequestHandler(
request,
session,
context,
sessionLogPrefix,
getGraphBinaryModule(),
graphSupportChecker)
.handle();
}
}
@Override
public CompletionStage<AsyncGraphResultSet> newFailure(RuntimeException error) {
return CompletableFutures.failedFuture(error);
}
}