com.datastax.dse.driver.api.core.metadata.schema.DseGraphKeyspaceMetadata Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.dse.driver.api.core.metadata.schema;
import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.ScriptBuilder;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.Map;
import java.util.Optional;
/**
* Specialized keyspace metadata, that handles the graph-specific properties introduced in DSE 6.8.
*
* This type only exists to avoid breaking binary compatibility. When the driver is connected to
* a DSE cluster, all the {@link KeyspaceMetadata} instances it returns can be safely downcast to
* this interface.
*/
public interface DseGraphKeyspaceMetadata extends DseKeyspaceMetadata {
/** The graph engine that will be used to interpret this keyspace. */
@NonNull
Optional getGraphEngine();
@NonNull
@Override
default String describe(boolean pretty) {
ScriptBuilder builder = new ScriptBuilder(pretty);
if (isVirtual()) {
builder.append("/* VIRTUAL ");
} else {
builder.append("CREATE ");
}
builder
.append("KEYSPACE ")
.append(getName())
.append(" WITH replication = { 'class' : '")
.append(getReplication().get("class"))
.append("'");
for (Map.Entry entry : getReplication().entrySet()) {
if (!entry.getKey().equals("class")) {
builder
.append(", '")
.append(entry.getKey())
.append("': '")
.append(entry.getValue())
.append("'");
}
}
builder.append(" } AND durable_writes = ").append(Boolean.toString(isDurableWrites()));
getGraphEngine()
.ifPresent(
graphEngine -> builder.append(" AND graph_engine ='").append(graphEngine).append("'"));
builder.append(";");
if (isVirtual()) {
builder.append(" */");
}
return builder.build();
}
}