| /* |
| * 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.geronimo.microprofile.opentracing.common.config; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.ServiceConfigurationError; |
| import java.util.ServiceLoader; |
| |
| class DefaultOpenTracingConfig implements GeronimoOpenTracingConfig { |
| private final Map<String, String> configuration = new HashMap<>(); |
| |
| DefaultOpenTracingConfig() { |
| System.getProperties().stringPropertyNames() |
| .forEach(k -> configuration.put(k, System.getProperty(k))); |
| try (final InputStream stream = Thread.currentThread().getContextClassLoader().getResourceAsStream("META-INF/geronimo/microprofile/opentracing.properties")) { |
| if (stream != null) { |
| final Properties properties = new Properties(); |
| properties.load(stream); |
| properties.stringPropertyNames().forEach(k -> configuration.put(k, properties.getProperty(k))); |
| } |
| } catch (final IOException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| @Override |
| public String read(final String value, final String def) { |
| return configuration.getOrDefault(value, def); |
| } |
| } |
| |
| @FunctionalInterface |
| public interface GeronimoOpenTracingConfig { |
| |
| String read(String value, String def); |
| |
| static GeronimoOpenTracingConfig create() { |
| try { |
| final Iterator<GeronimoOpenTracingConfig> iterator = ServiceLoader.load(GeronimoOpenTracingConfig.class).iterator(); |
| if (iterator.hasNext()) { |
| return new PrefixedConfig(iterator.next()); |
| } |
| } catch (final ServiceConfigurationError | ExceptionInInitializerError | NoClassDefFoundError | Exception e) { |
| // no-op |
| } |
| return new PrefixedConfig(new DefaultOpenTracingConfig()); |
| } |
| } |