com.datastax.dse.driver.internal.core.insights.DataCentersFinder Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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package com.datastax.dse.driver.internal.core.insights;
import static com.datastax.oss.driver.api.core.config.DefaultDriverOption.CONNECTION_POOL_REMOTE_SIZE;
import com.datastax.oss.driver.api.core.config.DriverExecutionProfile;
import com.datastax.oss.driver.api.core.loadbalancing.NodeDistance;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.internal.core.context.InternalDriverContext;
import com.datastax.oss.driver.shaded.guava.common.annotations.VisibleForTesting;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
class DataCentersFinder {
Set getDataCenters(InternalDriverContext driverContext) {
return getDataCenters(
driverContext.getMetadataManager().getMetadata().getNodes().values(),
driverContext.getConfig().getDefaultProfile());
}
@VisibleForTesting
Set getDataCenters(Collection nodes, DriverExecutionProfile executionProfile) {
int remoteConnectionsLength = executionProfile.getInt(CONNECTION_POOL_REMOTE_SIZE);
Set dataCenters = new HashSet<>();
for (Node n : nodes) {
NodeDistance distance = n.getDistance();
if (distance.equals(NodeDistance.LOCAL)
|| (distance.equals(NodeDistance.REMOTE) && remoteConnectionsLength > 0)) {
dataCenters.add(n.getDatacenter());
}
}
return dataCenters;
}
}