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Process.java
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Process.java
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/*
* Copyright 2012 Adam Murdoch
*
* 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 net.rubygrapefruit.platform;
import java.io.File;
/**
* Functions to query and modify a process' state.
*/
@ThreadSafe
public interface Process extends NativeIntegration {
/**
* Returns the process identifier.
*
* @throws NativeException On failure.
*/
@ThreadSafe
int getProcessId() throws NativeException;
/**
* Returns the process' current working directory.
*
* @throws NativeException On failure.
*/
@ThreadSafe
File getWorkingDirectory() throws NativeException;
/**
* Sets the process' working directory.
*
* @throws NativeException On failure.
*/
@ThreadSafe
void setWorkingDirectory(File directory) throws NativeException;
/**
* Get the value of an environment variable.
*
* @return The value or null if no such environment variable. Also returns null for an environment variable whose
* value is an empty string.
* @throws NativeException On failure.
*/
@ThreadSafe
String getEnvironmentVariable(String name) throws NativeException;
/**
* Sets the value of an environment variable.
*
* @param value the new value. Use null or an empty string to remove the environment variable. Note that on some
* platforms it is not possible to remove the environment variable safely. On such platforms, the value is set to an
* empty string instead.
* @throws NativeException On failure.
*/
@ThreadSafe
void setEnvironmentVariable(String name, String value) throws NativeException;
}