eribeiro commented on a change in pull request #864: SOLR-13101 : Shared storage support in SolrCloud URL: https://github.com/apache/lucene-solr/pull/864#discussion_r326426011
########## File path: solr/core/src/java/org/apache/solr/store/blob/client/BlobstoreProviderType.java ########## @@ -0,0 +1,66 @@ +/* + * 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.solr.store.blob.client; + +import java.lang.invoke.MethodHandles; + +import org.apache.solr.common.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Enum of identifiers for the underlying blob store service + */ +public enum BlobstoreProviderType { + /** Host's local disk */ + LOCAL_FILE_SYSTEM, + /** Amazon Web Services - S3 */ + S3, + /** Google Cloud Storage - GCS */ + GCS; + + private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); + + /** + * Blob storage provider is expected to be in this environment variable + */ + private static final String BLOB_STORAGE_PROVIDER_ENV = "BLOB_STORAGE_PROVIDER"; + + /** + * Reads blob storage from environment variable + * + * @return {@link BlobstoreProviderType} that's configured or + * {@link BlobstoreProviderType#LOCAL_FILE_SYSTEM} when blob storage provider environment variable is not set + */ + public static BlobstoreProviderType getConfiguredProvider() { + String provider = System.getenv(BLOB_STORAGE_PROVIDER_ENV); + + if (StringUtils.isEmpty(provider)) { + log.error("BlobstoreProviderType: blob storage provider is not defined in environment variable " + + BLOB_STORAGE_PROVIDER_ENV + ". Falling back to local file system."); + return LOCAL_FILE_SYSTEM; + } + + try { + log.info("BlobstoreProviderType: Blob storage provider type configured is " + provider); Review comment: Good question! :) I'd have to setup a jmh test harness to see.:thinking: But see, interpolation is being used in other files of this PR, so maybe reach uniformity? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
