org.apache.druid.storage.cloudfiles.CloudFilesUtils 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 org.apache.druid.storage.cloudfiles;
import com.google.common.base.Predicate;
import org.apache.druid.java.util.common.RetryUtils;
import org.apache.druid.java.util.common.RetryUtils.Task;
import java.io.IOException;
/**
*
*/
public class CloudFilesUtils
{
public static final Predicate CLOUDFILESRETRY = new Predicate()
{
@Override
public boolean apply(Throwable e)
{
if (e == null) {
return false;
} else if (e instanceof IOException) {
return true;
} else {
return apply(e.getCause());
}
}
};
/**
* Retries CloudFiles operations that fail due to io-related exceptions.
*/
public static T retryCloudFilesOperation(Task f, final int maxTries) throws Exception
{
return RetryUtils.retry(f, CLOUDFILESRETRY, maxTries);
}
public static String buildCloudFilesPath(String basePath, final String fileName)
{
String path = fileName;
if (!basePath.isEmpty()) {
int lastSlashIndex = basePath.lastIndexOf('/');
if (lastSlashIndex != -1) {
basePath = basePath.substring(0, lastSlashIndex);
}
path = basePath + "/" + fileName;
}
return path;
}
}