com.streamsets.pipeline.api.credential.CredentialValue Maven / Gradle / Ivy
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/*
* Copyright 2017 StreamSets Inc.
*
* 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.streamsets.pipeline.api.credential;
import com.streamsets.pipeline.api.StageException;
/**
* Type for Stage configuration variables using ${credential:get(...)} EL functions.
*
* A CredentialValue instance encapsulate the retrieval of credential allowing lazy and refresh retrievals.
*/
public interface CredentialValue {
/**
* Returns the credential value.
*
* @return the credential value.
* @throws StageException thrown if the credential value does not exist or if user is not authorized to retrieve
* the credential.
*/
String get() throws StageException;
}