ratpack.util.internal.Environment.java Source code

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Here is the source code for ratpack.util.internal.Environment.java

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/*
 * Copyright 2017 the original author or authors.
 *
 * 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 ratpack.util.internal;

import com.google.common.collect.Iterables;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.management.ManagementFactory;
import java.util.Arrays;
import java.util.Map;
import java.util.Properties;
import java.util.function.Predicate;
import java.util.function.Supplier;

public class Environment {

    public static final Environment INSTANCE = new Environment(System.getenv(), System.getProperties());
    public static final String DEVELOPMENT_PROPERTY = "ratpack.development";
    public static final String INTELLIJ_MAIN = "com.intellij.rt.execution.application.AppMain";
    public static final String INTELLIJ_JUNIT = "com.intellij.rt.execution.junit.JUnitStarter";
    public static final String GROOVY_MAIN = "org.codehaus.groovy.tools.GroovyStarter";
    public static final String SUN_JAVA_COMMAND = "sun.java.command";

    private static final Logger LOGGER = LoggerFactory.getLogger(Environment.class);

    private final Map<String, String> env;
    private final Properties properties;

    public Environment(Map<String, String> env, Properties properties) {
        this.env = env;
        this.properties = properties;
    }

    public static Environment env() {
        return INSTANCE;
    }

    @SafeVarargs
    @SuppressWarnings("varargs")
    protected static <T> T get(T defaultValue, Predicate<? super T> accept, Supplier<T>... suppliers) {
        return Iterables.find(Iterables.transform(Arrays.asList(suppliers), Supplier::get), accept::test,
                defaultValue);
    }

    public Map<String, String> getenv() {
        return env;
    }

    public Properties getProperties() {
        return properties;
    }

    public boolean isDevelopment() {
        return Boolean.parseBoolean(get("false", i -> i != null, () -> properties.getProperty(DEVELOPMENT_PROPERTY),
                () -> env.get("RATPACK_DEVELOPMENT"), () -> {
                    String command = properties.getProperty(SUN_JAVA_COMMAND, "");
                    return command.startsWith(INTELLIJ_MAIN) && !command.contains(INTELLIJ_JUNIT) ? "true" : null;
                }, () -> {
                    String command = properties.getProperty(SUN_JAVA_COMMAND, "");
                    return command.startsWith(GROOVY_MAIN) ? "true" : null;
                }, () -> isDebuggerAttached() ? "true" : null));
    }

    protected static boolean isDebuggerAttached() {
        return ManagementFactory.getRuntimeMXBean().getInputArguments().toString().indexOf("-agentlib:jdwp") > 0;
    }

}