forked from googleapis/java-bigtable-hbase
/
BigtableHBaseVersion.java
71 lines (64 loc) · 2.55 KB
/
BigtableHBaseVersion.java
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/*
* Copyright 2021 Google LLC
*
* 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.google.cloud.bigtable.hbase;
import com.google.api.client.util.Joiner;
import com.google.api.core.InternalApi;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.client.AbstractBigtableConnection;
/** For internal use only - public for technical reasons. */
@InternalApi("For internal usage only")
public class BigtableHBaseVersion {
private static final Log LOG = LogFactory.getLog(BigtableHBaseVersion.class);
private static final AtomicBoolean wasInitialized = new AtomicBoolean(false);
// {x-version-update-start:bigtable-client-parent:current}
public static final String VERSION = "1.24.0";
// {x-version-update-end}
/**
* Gets user agent from bigtable-hbase-version.properties. Returns a default dev user agent with
* current timestamp if not found.
*/
public static String getVersion() {
if (wasInitialized.compareAndSet(false, true)) {
warnOnVersionConflict();
}
return VERSION;
}
private static void warnOnVersionConflict() {
List<URL> classResources;
// Use AbstractBigtableConnection as a marker to detect multiple versions on the classpath
// Convert package.name.class.name -> package/name/class/name.class so that the classfile could
// be probed as a resource
String knownClassResourcePath =
AbstractBigtableConnection.class.getName().replaceAll("\\.", "/") + ".class";
try {
classResources = Collections.list(ClassLoader.getSystemResources(knownClassResourcePath));
} catch (IOException e) {
LOG.warn("Failed to probe for client version conflicts", e);
return;
}
if (classResources.size() != 1) {
LOG.warn(
"Found multiple copies of the bigtable-hbase on the classpath: "
+ Joiner.on(',').join(classResources));
}
}
}