kafka FileTokenRetriever 源码
kafka FileTokenRetriever 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/FileTokenRetriever.java
/*
* 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.kafka.common.security.oauthbearer.internals.secured;
import java.io.IOException;
import java.nio.file.Path;
import org.apache.kafka.common.utils.Utils;
/**
* <code>FileTokenRetriever</code> is an {@link AccessTokenRetriever} that will load the contents,
* interpreting them as a JWT access key in the serialized form.
*
* @see AccessTokenRetriever
*/
public class FileTokenRetriever implements AccessTokenRetriever {
private final Path accessTokenFile;
private String accessToken;
public FileTokenRetriever(Path accessTokenFile) {
this.accessTokenFile = accessTokenFile;
}
@Override
public void init() throws IOException {
this.accessToken = Utils.readFileAsString(accessTokenFile.toFile().getPath());
}
@Override
public String retrieve() throws IOException {
if (accessToken == null)
throw new IllegalStateException("Access token is null; please call init() first");
return accessToken;
}
}
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