| /* |
| * 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.nifi.stateless.bootstrap; |
| |
| import org.apache.nifi.stateless.config.ParameterProvider; |
| |
| import java.util.Map; |
| |
| public class EnvironmentVariableParameterProvider implements ParameterProvider { |
| private final Map<String, String> environmentVariables = System.getenv(); |
| |
| @Override |
| public String getParameterValue(final String contextName, final String parameterName) { |
| String envValue = environmentVariables.get(contextName + ":" + parameterName); |
| if (envValue != null) { |
| return envValue; |
| } |
| |
| return environmentVariables.get(parameterName); |
| } |
| |
| @Override |
| public boolean isParameterDefined(final String contextName, final String parameterName) { |
| return getParameterValue(contextName, parameterName) != null; |
| } |
| } |