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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.android.tradefed.targetprep.companion;
import com.android.tradefed.config.GlobalConfiguration;
import com.android.tradefed.device.DeviceSelectionOptions;
import com.android.tradefed.device.FreeDeviceState;
import com.android.tradefed.device.IDeviceManager;
import com.android.tradefed.device.ITestDevice;
import com.android.tradefed.device.TestDeviceState;
import com.android.tradefed.log.LogUtil.CLog;
import java.util.HashMap;
import java.util.Map;
/**
* A class for allocating and freeing companion devices
*/
public class CompanionDeviceTracker {
private static CompanionDeviceTracker sInst = null;
private Map<ITestDevice, ITestDevice> mDeviceMapping = null;
private CompanionDeviceTracker() {
mDeviceMapping = new HashMap<ITestDevice, ITestDevice>();
}
/**
* Retrieves singleton instance of the tracker
*/
public static CompanionDeviceTracker getInstance() {
if (sInst == null) {
sInst = new CompanionDeviceTracker();
}
return sInst;
}
/**
* Allocate a companion device based on selection criteria.
*
* @param device the primary device. used to identify the companion device
* @param opt selection criteria
* @return the device allocated or <code>null</code> if none available
*/
public ITestDevice allocateCompanionDevice(ITestDevice device, DeviceSelectionOptions opt) {
ITestDevice companion = getDeviceManager().allocateDevice(opt);
if (companion != null) {
if (mDeviceMapping.containsKey(device)) {
CLog.w("device %s already has an allocated companion %s",
device.getSerialNumber(), mDeviceMapping.get(companion).getSerialNumber());
}
CLog.i("allocated companion device %s for primary device %s",
companion.getSerialNumber(), device.getSerialNumber());
mDeviceMapping.put(device, companion);
}
return companion;
}
/**
* Free the companion device as identified by the primary device
* @param device the primary device whose corresponding companion device should be freed
* @throws IllegalStateException if no companion devices
*/
public void freeCompanionDevice(ITestDevice device) {
if (!mDeviceMapping.containsKey(device)) {
CLog.w("primary device %s has no tracked companion device", device.getSerialNumber());
return;
}
ITestDevice companion = mDeviceMapping.remove(device);
FreeDeviceState deviceState = FreeDeviceState.AVAILABLE;
if (!TestDeviceState.ONLINE.equals(companion.getDeviceState())) {
//If the device is offline at the end of the test
deviceState = FreeDeviceState.UNAVAILABLE;
}
getDeviceManager().freeDevice(companion, deviceState);
CLog.i("freed companion device %s for primary device %s",
companion.getSerialNumber(), device.getSerialNumber());
}
/**
* Retrieve the allocated companion device as identified by the primary device
* @param device the primary device that the companion device is allocated with
* @return the companion device or <code>null</code> if not found
*/
public ITestDevice getCompanionDevice(ITestDevice device) {
return mDeviceMapping.get(device);
}
private IDeviceManager getDeviceManager() {
return GlobalConfiguration.getDeviceManagerInstance();
}
}
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