com.teradata.benchto.driver.macro.shell.ShellMacroExecutionDriver Maven / Gradle / Ivy

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/*
 * 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.teradata.benchto.driver.macro.shell;

import com.google.common.collect.ImmutableMap;
import com.teradata.benchto.driver.Benchmark;
import com.teradata.benchto.driver.BenchmarkExecutionException;
import com.teradata.benchto.driver.macro.MacroExecutionDriver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.util.Map;
import java.util.Optional;
import java.util.function.Consumer;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;

/**
 * Executes macros using bash defined in application yaml file.
 */
@Component
public class ShellMacroExecutionDriver
        implements MacroExecutionDriver
{
    private static final Logger LOGGER = LoggerFactory.getLogger(ShellMacroExecutionDriver.class);

    private static final String SHELL = "bash";

    @Autowired
    private ShellMacrosProperties macros;

    public boolean canExecuteBenchmarkMacro(String macroName)
    {
        return macros.getMacros().containsKey(macroName);
    }

    @Override
    public void runBenchmarkMacro(String macroName, Optional benchmark, Optional connection)
    {
        runBenchmarkMacro(macroName, ImmutableMap.of());
    }

    public void runBenchmarkMacro(String macroName, Map environment)
    {
        try {
            String macroCommand = getMacroCommand(macroName);
            ProcessBuilder processBuilder = new ProcessBuilder(SHELL, "-c", macroCommand);
            processBuilder.environment().putAll(environment);
            Process macroProcess = processBuilder.start();
            LOGGER.info("Executing macro: '{}'", macroCommand);
            macroProcess.waitFor();
            boolean completedSuccessfully = macroProcess.exitValue() == 0;
            printOutput(macroProcess, !completedSuccessfully);
            checkState(completedSuccessfully, "Macro %s exited with code %s", macroName, macroProcess.exitValue());
        }
        catch (IOException | InterruptedException e) {
            throw new BenchmarkExecutionException("Could not execute macro " + macroName, e);
        }
    }

    private String getMacroCommand(String macroName)
    {
        checkArgument(macros.getMacros().containsKey(macroName), "Macro %s is not defined", macroName);
        return requireNonNull(macros.getMacros().get(macroName).getCommand(), "Macro " + macroName + " has no command defined");
    }

    private void printOutput(Process process, boolean stdoutAsError)
            throws IOException
    {
        logStream(process.getInputStream(), line -> {
            line = "stdout: " + line;
            if (stdoutAsError) {
                LOGGER.error(line);
            }
            else {
                LOGGER.debug(line);
            }
        });
        logStream(process.getErrorStream(), line -> LOGGER.error("stderr: " + line));
    }

    private void logStream(InputStream inputStream, Consumer logger)
            throws IOException
    {
        String line;
        try (BufferedReader input = new BufferedReader(new InputStreamReader(inputStream))) {
            while ((line = input.readLine()) != null) {
                logger.accept(line);
            }
        }
    }
}