| // Copyright 2017 Twitter. All rights reserved. |
| // |
| // 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.twitter.heron.apiserver.utils; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.Writer; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import org.yaml.snakeyaml.DumperOptions; |
| import org.yaml.snakeyaml.Yaml; |
| |
| import com.twitter.heron.api.generated.TopologyAPI; |
| import com.twitter.heron.common.basics.SysUtils; |
| import com.twitter.heron.scheduler.utils.SubmitterUtils; |
| import com.twitter.heron.spi.common.Config; |
| import com.twitter.heron.spi.common.ConfigLoader; |
| |
| public final class ConfigUtils { |
| |
| private static final String CONFIG_SUFFIX = ".yaml"; |
| |
| public static Config.Builder builder(Config baseConfiguration) { |
| return Config.newBuilder().putAll(baseConfiguration); |
| } |
| |
| public static String createOverrideConfiguration(Properties properties) throws IOException { |
| final Path overridesPath = Files.createTempFile("overrides-", CONFIG_SUFFIX); |
| try (Writer writer = Files.newBufferedWriter(overridesPath)) { |
| final Map<Object, Object> overrides = new HashMap<>(); |
| for (Map.Entry<Object, Object> entry : properties.entrySet()) { |
| overrides.put(entry.getKey(), entry.getValue()); |
| } |
| final Yaml yaml = newYaml(); |
| yaml.dump(overrides, writer); |
| |
| return overridesPath.toFile().getAbsolutePath(); |
| } finally { |
| overridesPath.toFile().deleteOnExit(); |
| } |
| } |
| |
| public static Config getBaseConfiguration(String heronDirectory, |
| String heronConfigDirectory, |
| String releaseFile, |
| String overrideConfigurationFile) { |
| // TODO add release file |
| return ConfigLoader.loadConfig(heronDirectory, |
| heronConfigDirectory, |
| releaseFile, |
| overrideConfigurationFile); |
| } |
| |
| public static Config getTopologyConfig(String topologyPackage, String topologyBinaryFile, |
| String topologyDefinitionFile, TopologyAPI.Topology topology) { |
| return SubmitterUtils.topologyConfigs( |
| topologyPackage, |
| topologyBinaryFile, |
| topologyDefinitionFile, |
| topology); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static void applyOverrides(Path overridesPath, Map<String, String> overrides) |
| throws IOException { |
| if (overrides.isEmpty()) { |
| return; |
| } |
| final Path tempOverridesPath = Files.createTempFile("overrides-", CONFIG_SUFFIX); |
| |
| Reader overrideReader = null; |
| try (Writer writer = Files.newBufferedWriter(tempOverridesPath)) { |
| overrideReader = Files.newBufferedReader(overridesPath); |
| final Map<String, Object> currentOverrides = |
| (Map<String, Object>) new Yaml().load(overrideReader); |
| currentOverrides.putAll(overrides); |
| |
| // write updated overrides |
| newYaml().dump(currentOverrides, writer); |
| |
| // close override file so we can replace it with the updated overrides |
| overrideReader.close(); |
| |
| FileHelper.copy(tempOverridesPath, overridesPath); |
| } finally { |
| tempOverridesPath.toFile().delete(); |
| SysUtils.closeIgnoringExceptions(overrideReader); |
| } |
| } |
| |
| // this is needed because the heron executor ignores the override.yaml |
| @SuppressWarnings("unchecked") |
| public static void applyOverridesToStateManagerConfig(Path overridesPath, |
| Path stateManagerPath) throws IOException { |
| final Path tempStateManagerPath = Files.createTempFile("statemgr-", CONFIG_SUFFIX); |
| Reader stateManagerReader = null; |
| try ( |
| Reader overrideReader = Files.newBufferedReader(overridesPath); |
| Writer writer = Files.newBufferedWriter(tempStateManagerPath); |
| ) { |
| stateManagerReader = Files.newBufferedReader(stateManagerPath); |
| |
| final Map<String, Object> overrides = (Map<String, Object>) new Yaml().load(overrideReader); |
| final Map<String, Object> stateMangerConfig = |
| (Map<String, Object>) new Yaml().load(stateManagerReader); |
| // update the state manager config with the overrides |
| for (Map.Entry<String, Object> entry : overrides.entrySet()) { |
| // does this key have an override? |
| if (stateMangerConfig.containsKey(entry.getKey())) { |
| stateMangerConfig.put(entry.getKey(), entry.getValue()); |
| } |
| } |
| |
| // write new state manager config |
| newYaml().dump(stateMangerConfig, writer); |
| |
| // close state manager file so we can replace it with the updated configuration |
| stateManagerReader.close(); |
| |
| FileHelper.copy(tempStateManagerPath, stateManagerPath); |
| } finally { |
| tempStateManagerPath.toFile().delete(); |
| SysUtils.closeIgnoringExceptions(stateManagerReader); |
| } |
| } |
| |
| private static Yaml newYaml() { |
| final DumperOptions options = new DumperOptions(); |
| options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK); |
| options.setPrettyFlow(true); |
| |
| return new Yaml(options); |
| } |
| |
| private ConfigUtils() { |
| } |
| } |