org.springframework.batch.core.step.tasklet.CommandRunner Maven / Gradle / Ivy
/*
* Copyright 2006-2022 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
*
* https://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.springframework.batch.core.step.tasklet;
import java.io.File;
import java.io.IOException;
/**
* Strategy interface for executing commands. This abstraction is useful to decouple the
* command execution from the enclosing tasklet so that implementations can be unit tested
* in isolation.
*
* @author Stefano Cordio
* @author Mahmoud Ben Hassine
* @since 5.0
*/
public interface CommandRunner {
/**
* Executes the specified string command in a separate process with the specified
* environment and working directory.
* @param command a specified system command and its arguments.
* @param envp array of strings, each element of which has environment variable
* settings in the format name=value, or {@code null} if the subprocess
* should inherit the environment of the current process.
* @param dir the working directory of the subprocess, or {@code null} if the
* subprocess should inherit the working directory of the current process.
* @return A new {@link Process} object for managing the subprocess
* @throws SecurityException If a security manager exists and its
* {@link SecurityManager#checkExec checkExec} method doesn't allow creation of the
* subprocess
* @throws IOException If an I/O error occurs
* @throws NullPointerException If {@code command} is {@code null}, or one of the
* elements of {@code envp} is {@code null}
* @throws IllegalArgumentException If {@code command} is empty
*
* @see Runtime#exec(String, String[], File)
*/
Process exec(String command[], String[] envp, File dir) throws IOException;
}