/*
* Copyright 2013-present Facebook, Inc.
*
* 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.facebook.buck.util.environment;
import java.util.Optional;
public interface ExecutionEnvironment {
/** @return The current hostname or 'unknown' */
String getHostname();
/** @return The current username or 'unknown' */
String getUsername();
/** @return The number of cores on this machine. */
int getAvailableCores();
/** @return The amount of system memory on this machine in bytes. */
long getTotalMemory();
/** @return The current operating system. */
Platform getPlatform();
/** @return Whether an ethernet interface is available and enabled. */
Network getLikelyActiveNetwork();
/** @return The SSID of the current wifi network if it can be determined. */
Optional<String> getWifiSsid();
/** Gets the environment variable indicated by the specified key. */
String getenv(String key, String defaultValue);
}