nastra commented on code in PR #11577: URL: https://github.com/apache/iceberg/pull/11577#discussion_r1886971501
########## azure/src/main/java/org/apache/iceberg/azure/adlsv2/VendedAdlsCredentialProvider.java: ########## @@ -0,0 +1,197 @@ +/* + * 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.iceberg.azure.adlsv2; + +import com.azure.core.credential.AzureSasCredential; +import java.io.Serializable; +import java.util.List; +import java.util.Map; +import java.util.concurrent.Future; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.TimeUnit; +import java.util.stream.Collectors; +import org.apache.commons.io.IOUtils; +import org.apache.iceberg.azure.AzureProperties; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.rest.ErrorHandlers; +import org.apache.iceberg.rest.HTTPClient; +import org.apache.iceberg.rest.RESTClient; +import org.apache.iceberg.rest.RESTUtil; +import org.apache.iceberg.rest.auth.OAuth2Properties; +import org.apache.iceberg.rest.auth.OAuth2Util; +import org.apache.iceberg.rest.credentials.Credential; +import org.apache.iceberg.rest.responses.LoadCredentialsResponse; +import org.apache.iceberg.util.Pair; +import org.apache.iceberg.util.SerializableMap; +import org.apache.iceberg.util.ThreadPools; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class VendedAdlsCredentialProvider implements Serializable, AutoCloseable { + private static final Logger LOG = LoggerFactory.getLogger(VendedAdlsCredentialProvider.class); + + private static final String THREAD_PREFIX = "adls-vended-credential-refresh"; + public static final String URI = "credentials.uri"; + + private final SerializableMap<String, String> properties; + private transient volatile Map<String, AzureSasCredentialRefresher> + azureSasCredentialRefresherMap; + private transient volatile RESTClient client; + private transient volatile ScheduledExecutorService refreshExecutor; + + public VendedAdlsCredentialProvider(Map<String, String> properties) { + Preconditions.checkArgument(null != properties, "Invalid properties: null"); + Preconditions.checkArgument(null != properties.get(URI), "Invalid URI: null"); + this.properties = SerializableMap.copyOf(properties); + azureSasCredentialRefresherMap = Maps.newHashMap(); + } + + public AzureSasCredential credentialForAccount(String storageAccount) { + Map<String, AzureSasCredentialRefresher> refresherForAccountMap = + azureSasCredentialRefresherMap(); + if (refresherForAccountMap.containsKey(storageAccount)) { + return refresherForAccountMap.get(storageAccount).azureSasCredential(); + } else { + AzureSasCredentialRefresher azureSasCredentialRefresher = + new AzureSasCredentialRefresher( + () -> this.sasTokenWithExpiration(storageAccount), credentialRefreshExecutor()); + refresherForAccountMap.put(storageAccount, azureSasCredentialRefresher); + return azureSasCredentialRefresher.azureSasCredential(); + } + } + + private Pair<String, Long> sasTokenWithExpiration(String storageAccount) { + LoadCredentialsResponse response = fetchCredentials(); + List<Credential> adlsCredentials = + response.credentials().stream() + .filter(c -> c.prefix().contains(storageAccount)) + .collect(Collectors.toList()); + Preconditions.checkState( + !adlsCredentials.isEmpty(), + String.format("Invalid ADLS Credentials for storage-account %s: empty", storageAccount)); + Preconditions.checkState( + adlsCredentials.size() == 1, + "Invalid ADLS Credentials: only one ADLS credential should exist per storage-account"); + + Credential adlsCredential = adlsCredentials.get(0); + checkCredential(adlsCredential, AzureProperties.ADLS_SAS_TOKEN_PREFIX + storageAccount); + checkCredential( + adlsCredential, AzureProperties.ADLS_SAS_TOKEN_EXPIRES_AT_MS_PREFIX + storageAccount); + + String updatedSasToken = + adlsCredential.config().get(AzureProperties.ADLS_SAS_TOKEN_PREFIX + storageAccount); + Long tokenExpiresAtMillis = + Long.parseLong( + adlsCredential + .config() + .get(AzureProperties.ADLS_SAS_TOKEN_EXPIRES_AT_MS_PREFIX + storageAccount)); + + return Pair.of(updatedSasToken, tokenExpiresAtMillis); + } + + private Map<String, AzureSasCredentialRefresher> azureSasCredentialRefresherMap() { + if (this.azureSasCredentialRefresherMap == null) { + synchronized (this) { + if (this.azureSasCredentialRefresherMap == null) { + this.azureSasCredentialRefresherMap = Maps.newHashMap(); + } + } + } + return this.azureSasCredentialRefresherMap; + } + + private ScheduledExecutorService credentialRefreshExecutor() { + if (this.refreshExecutor == null) { + synchronized (this) { + if (this.refreshExecutor == null) { + this.refreshExecutor = ThreadPools.newScheduledPool(THREAD_PREFIX, 1); + } + } + } + return this.refreshExecutor; + } + + private RESTClient httpClient() { + if (null == client) { + synchronized (this) { + if (null == client) { + client = HTTPClient.builder(properties).uri(properties.get(URI)).build(); + } + } + } + + return client; + } + + private LoadCredentialsResponse fetchCredentials() { + Map<String, String> headers = + RESTUtil.merge( + configHeaders(properties), Review Comment: I think for now let's leave the config headers out, because we also don't have them for vended S3/GCS credential providers -- This is an automated message from the Apache Git Service. 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