2 * Copyright (c) 2010-2022 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.automation.jrubyscripting.internal;
16 import java.nio.file.Path;
17 import java.nio.file.Paths;
18 import java.util.Collections;
19 import java.util.List;
21 import java.util.Optional;
22 import java.util.stream.Collectors;
23 import java.util.stream.Stream;
25 import javax.script.ScriptEngine;
26 import javax.script.ScriptEngineFactory;
27 import javax.script.ScriptException;
29 import org.eclipse.jdt.annotation.NonNullByDefault;
30 import org.eclipse.jdt.annotation.Nullable;
31 import org.openhab.core.OpenHAB;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
36 * Processes JRuby Configuration Parameters.
38 * @author Brian O'Connell - Initial contribution
39 * @author Jimmy Tanagra - Add $LOAD_PATH, require injection
42 public class JRubyScriptEngineConfiguration {
44 private final Logger logger = LoggerFactory.getLogger(JRubyScriptEngineConfiguration.class);
46 private static final Path DEFAULT_GEM_HOME = Paths.get(OpenHAB.getConfigFolder(), "scripts", "lib", "ruby",
49 private static final Path DEFAULT_RUBYLIB = Paths.get(OpenHAB.getConfigFolder(), "automation", "lib", "ruby");
51 private static final String GEM_HOME = "gem_home";
52 private static final String RUBYLIB = "rubylib";
53 private static final String GEMS = "gems";
54 private static final String REQUIRE = "require";
55 private static final String CHECK_UPDATE = "check_update";
57 // Map of configuration parameters
58 private static final Map<String, OptionalConfigurationElement> CONFIGURATION_PARAMETERS = Map.ofEntries(
59 Map.entry("local_context",
60 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.SYSTEM_PROPERTY)
61 .mappedTo("org.jruby.embed.localcontext.scope").defaultValue("singlethread").build()),
63 Map.entry("local_variable",
64 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.SYSTEM_PROPERTY)
65 .mappedTo("org.jruby.embed.localvariable.behavior").defaultValue("transient").build()),
68 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.RUBY_ENVIRONMENT)
69 .mappedTo("GEM_HOME").defaultValue(DEFAULT_GEM_HOME.toString()).build()),
72 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.RUBY_ENVIRONMENT)
73 .mappedTo("RUBYLIB").defaultValue(DEFAULT_RUBYLIB.toString()).build()),
75 Map.entry(GEMS, new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.GEM).build()),
78 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.REQUIRE).build()),
80 Map.entry(CHECK_UPDATE,
81 new OptionalConfigurationElement.Builder(OptionalConfigurationElement.Type.CHECK_UPDATE).build()));
83 private static final Map<OptionalConfigurationElement.Type, List<OptionalConfigurationElement>> CONFIGURATION_TYPE_MAP = CONFIGURATION_PARAMETERS
84 .values().stream().collect(Collectors.groupingBy(v -> v.type));
87 * Update configuration
89 * @param config Configuration parameters to apply to ScriptEngine
90 * @param factory ScriptEngineFactory to configure
92 void update(Map<String, Object> config, ScriptEngineFactory factory) {
93 logger.trace("JRuby Script Engine Configuration: {}", config);
94 config.forEach(this::processConfigValue);
95 configureScriptEngine(factory);
99 * Apply configuration key/value to known configuration parameters
101 * @param key Configuration key
102 * @param value Configuration value
104 private void processConfigValue(String key, Object value) {
105 OptionalConfigurationElement configurationElement = CONFIGURATION_PARAMETERS.get(key);
106 if (configurationElement != null) {
107 configurationElement.setValue(value.toString());
109 logger.debug("Ignoring unexpected configuration key: {}", key);
114 * Configure the ScriptEngine
116 * @param factory Script Engine to configure
118 void configureScriptEngine(ScriptEngineFactory factory) {
119 configureSystemProperties();
121 ScriptEngine engine = factory.getScriptEngine();
122 configureRubyEnvironment(engine);
123 configureGems(engine);
127 * Makes Gem home directory if it does not exist
129 private void ensureGemHomeExists() {
130 OptionalConfigurationElement gemHomeConfigElement = CONFIGURATION_PARAMETERS.get(GEM_HOME);
131 if (gemHomeConfigElement == null) {
134 Optional<String> gemHome = gemHomeConfigElement.getValue();
135 if (gemHome.isPresent()) {
136 File gemHomeDirectory = new File(gemHome.get());
137 if (!gemHomeDirectory.exists()) {
138 logger.debug("gem_home directory does not exist, creating");
139 if (!gemHomeDirectory.mkdirs()) {
140 logger.warn("Error creating gem_home directory");
144 logger.debug("Gem install requested without gem_home specified, not ensuring gem_home path exists");
149 * Install a gems in ScriptEngine
151 * @param engine Engine to install gems
153 private synchronized void configureGems(ScriptEngine engine) {
154 ensureGemHomeExists();
156 OptionalConfigurationElement gemsConfigElement = CONFIGURATION_PARAMETERS.get(GEMS);
157 if (gemsConfigElement == null || !gemsConfigElement.getValue().isPresent()) {
160 boolean checkUpdate = true;
161 OptionalConfigurationElement updateConfigElement = CONFIGURATION_PARAMETERS.get(CHECK_UPDATE);
162 if (updateConfigElement != null && updateConfigElement.getValue().isPresent()) {
163 checkUpdate = updateConfigElement.getValue().get().equals("true");
166 String[] gems = gemsConfigElement.getValue().get().split(",");
167 String gemCommand = "require 'bundler/inline'\nrequire 'openssl'\n\ngemfile(" + checkUpdate + ") do\n"
168 + " source 'https://rubygems.org/'\n";
170 for (String gem : gems) {
173 if (gem.contains("=")) {
174 String[] gemParts = gem.split("=");
175 gem = gemParts[0].trim();
176 version = gemParts[1].trim();
183 gemCommand += " gem '" + gem + "'";
184 if (!version.isEmpty()) {
185 gemCommand += ", '" + version + "'";
187 gemCommand += ", require: false\n";
190 if (validGems == 0) {
193 gemCommand += "end\n";
196 logger.debug("Installing Gems");
197 logger.trace("Gem install code:\n{}", gemCommand);
198 engine.eval(gemCommand);
199 } catch (ScriptException e) {
200 logger.warn("Error installing Gems: {}", e.getMessage());
201 } catch (BootstrapMethodError e) {
202 logger.warn("Error while checking/installing gems: {}. You may need to restart OpenHAB", e.getMessage());
203 logger.debug("Error in configureGems", e);
208 * Execute ruby require statement in the ScriptEngine
210 * @param engine Engine to insert the require statements
212 public void injectRequire(ScriptEngine engine) {
213 OptionalConfigurationElement requireConfigElement = CONFIGURATION_PARAMETERS.get(REQUIRE);
214 if (requireConfigElement == null || !requireConfigElement.getValue().isPresent()) {
218 Stream.of(requireConfigElement.getValue().get().split(",")).map(s -> s.trim()).filter(s -> !s.isEmpty())
220 final String requireStatement = String.format("require '%s'", script);
222 logger.trace("Injecting require statement: {}", requireStatement);
223 engine.eval(requireStatement);
224 } catch (ScriptException e) {
225 logger.warn("Error evaluating statement {}: {}", requireStatement, e.getMessage());
231 * Configure the optional elements of the Ruby Environment
233 * @param engine Engine in which to configure environment
235 public ScriptEngine configureRubyEnvironment(ScriptEngine engine) {
236 getConfigurationElements(OptionalConfigurationElement.Type.RUBY_ENVIRONMENT).forEach(configElement -> {
237 final String environmentSetting = String.format("ENV['%s']='%s'", configElement.mappedTo().get(),
238 configElement.getValue().get());
240 logger.trace("Setting Ruby environment with code: {} ", environmentSetting);
241 engine.eval(environmentSetting);
242 } catch (ScriptException e) {
243 logger.warn("Error setting ruby environment", e);
247 configureRubyLib(engine);
252 * Split up and insert ENV['RUBYLIB'] into Ruby's $LOAD_PATH
253 * This needs to be called after ENV['RUBYLIB'] has been set by configureRubyEnvironment
255 * @param engine Engine in which to configure environment
257 private void configureRubyLib(ScriptEngine engine) {
258 OptionalConfigurationElement rubyLibConfigElement = CONFIGURATION_PARAMETERS.get(RUBYLIB);
259 if (rubyLibConfigElement == null) {
263 Optional<String> rubyLib = rubyLibConfigElement.getValue();
264 if (rubyLib.isPresent() && !rubyLib.get().trim().isEmpty()) {
265 final String code = "$LOAD_PATH.unshift *ENV['RUBYLIB']&.split(File::PATH_SEPARATOR)" + //
266 "&.reject(&:empty?)" + //
267 "&.reject { |path| $LOAD_PATH.include?(path) }"; //
270 } catch (ScriptException exception) {
271 logger.warn("Error setting $LOAD_PATH from RUBYLIB='{}': {}", rubyLib.get(), exception.getMessage());
277 * Configure system properties
279 * @param optionalConfigurationElements Optional system properties to configure
281 private void configureSystemProperties() {
282 getConfigurationElements(OptionalConfigurationElement.Type.SYSTEM_PROPERTY).forEach(configElement -> {
283 String systemProperty = configElement.mappedTo().get();
284 String propertyValue = configElement.getValue().get();
285 logger.trace("Setting system property ({}) to ({})", systemProperty, propertyValue);
286 System.setProperty(systemProperty, propertyValue);
290 private Stream<OptionalConfigurationElement> getConfigurationElements(
291 OptionalConfigurationElement.Type configurationType) {
292 return CONFIGURATION_TYPE_MAP
293 .getOrDefault(configurationType, Collections.<OptionalConfigurationElement> emptyList()).stream()
294 .filter(element -> element.getValue().isPresent());
298 * Inner static companion class for configuration elements
300 private static class OptionalConfigurationElement {
302 private final Optional<String> defaultValue;
303 private final Optional<String> mappedTo;
304 private final Type type;
305 private Optional<String> value;
307 private OptionalConfigurationElement(Type type, @Nullable String mappedTo, @Nullable String defaultValue) {
309 this.defaultValue = Optional.ofNullable(defaultValue);
310 this.mappedTo = Optional.ofNullable(mappedTo);
311 value = Optional.empty();
314 private Optional<String> getValue() {
315 return value.or(() -> defaultValue);
318 private void setValue(String value) {
319 this.value = Optional.of(value);
322 private Optional<String> mappedTo() {
334 private static class Builder {
335 private final Type type;
336 private @Nullable String defaultValue = null;
337 private @Nullable String mappedTo = null;
339 private Builder(Type type) {
343 private Builder mappedTo(String mappedTo) {
344 this.mappedTo = mappedTo;
348 private Builder defaultValue(String value) {
349 this.defaultValue = value;
353 private OptionalConfigurationElement build() {
354 return new OptionalConfigurationElement(type, mappedTo, defaultValue);