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MountService: Refactor to use NativeDaemonConnector and clean-up

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Signed-off-by: San Mehat <san@google.com>
This commit is contained in:
San Mehat
2010-01-12 12:21:18 -08:00
parent 67bd2cd75f
commit 22dd86e055
4 changed files with 173 additions and 414 deletions
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6
core/java/android/os/IMountService.aidl
View File

@@ -42,17 +42,17 @@ interface IMountService
/**
* Mount external storage at given mount point.
*/
void mountMedia(String mountPoint);
void mountVolume(String mountPoint);
/**
* Safely unmount external storage at given mount point.
*/
void unmountMedia(String mountPoint);
void unmountVolume(String mountPoint);
/**
* Format external storage given a mount point.
*/
void formatMedia(String mountPoint);
void formatVolume(String mountPoint);
/**
* Returns true if media notification sounds are enabled.

2
core/java/com/android/internal/app/ExternalMediaFormatActivity.java
View File

@@ -102,7 +102,7 @@ public class ExternalMediaFormatActivity extends AlertActivity implements Dialog
.getService("mount"));
if (mountService != null) {
try {
mountService.formatMedia(Environment.getExternalStorageDirectory().toString());
mountService.formatVolume(Environment.getExternalStorageDirectory().toString());
} catch (RemoteException e) {
}
}

377
services/java/com/android/server/MountListener.java
View File

@@ -1,377 +0,0 @@
/*
* Copyright (C) 2007 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.server;
import android.net.LocalSocketAddress;
import android.net.LocalSocket;
import android.os.Environment;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.util.Config;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.lang.IllegalStateException;
import java.util.List;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
/**
* Vold Connection class
*/
final class MountListener implements Runnable {
private static final String TAG = "MountListener";
private static final String VOLD_SOCKET = "vold";
private static final int RESPONSE_QUEUE_SIZE = 10;
private MountService mService;
private BlockingQueue<String> mResponseQueue;
private OutputStream mOutputStream;
class ResponseCode {
public static final int ActionInitiated = 100;
public static final int VolumeListResult = 110;
public static final int AsecListResult = 111;
public static final int CommandOkay = 200;
public static final int ShareAvailabilityResult = 210;
public static final int AsecPathResult = 211;
public static final int UnsolicitedInformational = 600;
public static final int VolumeStateChange = 605;
public static final int VolumeMountFailedBlank = 610;
public static final int VolumeMountFailedDamaged = 611;
public static final int VolumeMountFailedNoMedia = 612;
public static final int ShareAvailabilityChange = 620;
public static final int VolumeDiskInserted = 630;
public static final int VolumeDiskRemoved = 631;
public static final int VolumeBadRemoval = 632;
}
MountListener(MountService service) {
mService = service;
mResponseQueue = new LinkedBlockingQueue<String>(RESPONSE_QUEUE_SIZE);
}
public void run() {
// Vold does not run in the simulator, so fake out a mounted event to trigger the Media Scanner
if ("simulator".equals(SystemProperties.get("ro.product.device"))) {
mService.notifyMediaMounted(Environment.getExternalStorageDirectory().getPath(), false);
return;
}
try {
while (true) {
listenToSocket();
}
} catch (Throwable t) {
Log.e(TAG, "Fatal error " + t + " in MountListener thread!");
}
}
private void listenToSocket() {
LocalSocket socket = null;
try {
socket = new LocalSocket();
LocalSocketAddress address = new LocalSocketAddress(VOLD_SOCKET,
LocalSocketAddress.Namespace.RESERVED);
socket.connect(address);
mService.onVoldConnected();
InputStream inputStream = socket.getInputStream();
mOutputStream = socket.getOutputStream();
byte[] buffer = new byte[4096];
while (true) {
int count = inputStream.read(buffer);
if (count < 0) break;
int start = 0;
for (int i = 0; i < count; i++) {
if (buffer[i] == 0) {
String event = new String(buffer, start, i - start);
// Log.d(TAG, "Got packet {" + event + "}");
String[] tokens = event.split(" ");
try {
int code = Integer.parseInt(tokens[0]);
if (code >= ResponseCode.UnsolicitedInformational) {
try {
handleUnsolicitedEvent(code, event, tokens);
} catch (Exception ex) {
Log.e(TAG, String.format(
"Error handling '%s'", event), ex);
}
} else {
try {
mResponseQueue.put(event);
} catch (InterruptedException ex) {
Log.e(TAG, "InterruptedException");
}
}
} catch (NumberFormatException nfe) {
Log.w(TAG,
"Unknown msg from Vold '" + event + "'");
}
start = i + 1;
}
}
}
} catch (IOException ex) {
Log.e(TAG, "IOException in listenToSocket");
}
synchronized (this) {
if (mOutputStream != null) {
try {
mOutputStream.close();
} catch (IOException e) {
Log.w(TAG, "IOException closing output stream");
}
mOutputStream = null;
}
}
try {
if (socket != null) {
socket.close();
}
} catch (IOException ex) {
Log.w(TAG, "IOException closing socket");
}
Log.e(TAG, "Failed to connect to Vold", new IllegalStateException());
SystemClock.sleep(5000);
}
private void handleUnsolicitedEvent(int code, String raw,
String[] cooked) throws IllegalStateException {
// Log.d(TAG, "unsolicited {" + raw + "}");
if (code == ResponseCode.VolumeStateChange) {
// FMT: NNN Volume <label> <mountpoint> state changed from <old_#> (<old_str>) to <new_#> (<new_str>)
mService.notifyVolumeStateChange(cooked[2], cooked[3],
Integer.parseInt(cooked[7]),
Integer.parseInt(cooked[10]));
} else if (code == ResponseCode.VolumeMountFailedBlank) {
// FMT: NNN Volume <label> <mountpoint> mount failed - no supported file-systems
mService.notifyMediaNoFs(cooked[3]);
// FMT: NNN Volume <label> <mountpoint> mount failed - no media
} else if (code == ResponseCode.VolumeMountFailedNoMedia) {
mService.notifyMediaRemoved(cooked[3]);
} else if (code == ResponseCode.VolumeMountFailedDamaged) {
// FMT: NNN Volume <label> <mountpoint> mount failed - filesystem check failed
mService.notifyMediaUnmountable(cooked[3]);
} else if (code == ResponseCode.ShareAvailabilityChange) {
// FMT: NNN Share method <method> now <available|unavailable>
boolean avail = false;
if (cooked[5].equals("available")) {
avail = true;
}
mService.notifyShareAvailabilityChange(cooked[3], avail);
} else if (code == ResponseCode.VolumeDiskInserted) {
// FMT: NNN Volume <label> <mountpoint> disk inserted (<major>:<minor>)
mService.notifyMediaInserted(cooked[3]);
} else if (code == ResponseCode.VolumeDiskRemoved) {
// FMT: NNN Volume <label> <mountpoint> disk removed (<major>:<minor>)
mService.notifyMediaRemoved(cooked[3]);
} else if (code == ResponseCode.VolumeBadRemoval) {
// FMT: NNN Volume <label> <mountpoint> bad removal (<major>:<minor>)
mService.notifyMediaBadRemoval(cooked[3]);
} else {
Log.w(TAG, "Unhandled event {" + raw + "}");
}
}
private void sendCommand(String command) {
sendCommand(command, null);
}
/**
* Sends a command to Vold with a single argument
*
* @param command The command to send to the mount service daemon
* @param argument The argument to send with the command (or null)
*/
private void sendCommand(String command, String argument) {
synchronized (this) {
// Log.d(TAG, "sendCommand {" + command + "} {" + argument + "}");
if (mOutputStream == null) {
Log.e(TAG, "No connection to Vold", new IllegalStateException());
} else {
StringBuilder builder = new StringBuilder(command);
if (argument != null) {
builder.append(argument);
}
builder.append('\0');
try {
mOutputStream.write(builder.toString().getBytes());
} catch (IOException ex) {
Log.e(TAG, "IOException in sendCommand", ex);
}
}
}
}
private synchronized ArrayList<String> doCommand(String cmd) throws IllegalStateException {
sendCommand(cmd);
ArrayList<String> response = new ArrayList<String>();
boolean complete = false;
int code = -1;
while (!complete) {
try {
String line = mResponseQueue.take();
// Log.d(TAG, "Removed off queue -> " + line);
String[] tokens = line.split(" ");
code = Integer.parseInt(tokens[0]);
if ((code >= 200) && (code < 600))
complete = true;
response.add(line);
} catch (InterruptedException ex) {
Log.e(TAG, "InterruptedException");
}
}
if (code >= 400 && code < 600) {
throw new IllegalStateException(String.format(
"Command %s failed with code %d",
cmd, code));
}
return response;
}
boolean getShareAvailable(String method) throws IllegalStateException {
ArrayList<String> rsp = doCommand("share_available " + method);
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == ResponseCode.ShareAvailabilityResult) {
if (tok[2].equals("available"))
return true;
return false;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
/**
* Enables or disables USB mass storage support.
*
* @param enable true to enable USB mass storage support
*/
void setShareMethodEnabled(String mountPoint, String method,
boolean enable) throws IllegalStateException {
doCommand((enable ? "" : "un") + "share " + mountPoint + " " + method);
}
/**
* Mount media at given mount point.
*/
public void mountVolume(String label) throws IllegalStateException {
doCommand("mount " + label);
}
/**
* Unmount media at given mount point.
*/
public void unmountVolume(String label) throws IllegalStateException {
doCommand("unmount " + label);
}
/**
* Format media at given mount point.
*/
public void formatVolume(String label) throws IllegalStateException {
doCommand("format " + label);
}
public String createAsec(String id, int sizeMb, String fstype, String key,
int ownerUid) throws IllegalStateException {
String cmd = String.format("create_asec %s %d %s %s %d",
id, sizeMb, fstype, key, ownerUid);
doCommand(cmd);
return getAsecPath(id);
}
public void finalizeAsec(String id) throws IllegalStateException {
doCommand("finalize_asec " + id);
}
public void destroyAsec(String id) throws IllegalStateException {
doCommand("destroy_asec " + id);
}
public String mountAsec(String id, String key, int ownerUid) throws IllegalStateException {
String cmd = String.format("mount_asec %s %s %d",
id, key, ownerUid);
doCommand(cmd);
return getAsecPath(id);
}
public String getAsecPath(String id) throws IllegalStateException {
ArrayList<String> rsp = doCommand("asec_path " + id);
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == ResponseCode.AsecPathResult) {
return tok[1];
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
public String[] listAsec() throws IllegalStateException {
ArrayList<String> rsp = doCommand("list_asec");
String[] rdata = new String[rsp.size()];
int idx = 0;
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == ResponseCode.AsecListResult) {
rdata[idx++] = tok[1];
} else if (code == ResponseCode.CommandOkay) {
return rdata;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
}

202
services/java/com/android/server/MountService.java
View File

@@ -33,6 +33,7 @@ import android.os.UEventObserver;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Log;
import java.util.ArrayList;
import android.provider.Settings;
import android.content.ContentResolver;
@@ -46,7 +47,8 @@ import java.lang.IllegalStateException;
* MountService implements an to the mount service daemon
* @hide
*/
class MountService extends IMountService.Stub {
class MountService extends IMountService.Stub
implements INativeDaemonConnectorCallbacks {
private static final String TAG = "MountService";
@@ -63,15 +65,33 @@ class MountService extends IMountService.Stub {
public static final int SharedMnt = 8;
}
class VoldResponseCode {
public static final int VolumeListResult = 110;
public static final int AsecListResult = 111;
public static final int ShareAvailabilityResult = 210;
public static final int AsecPathResult = 211;
public static final int VolumeStateChange = 605;
public static final int VolumeMountFailedBlank = 610;
public static final int VolumeMountFailedDamaged = 611;
public static final int VolumeMountFailedNoMedia = 612;
public static final int ShareAvailabilityChange = 620;
public static final int VolumeDiskInserted = 630;
public static final int VolumeDiskRemoved = 631;
public static final int VolumeBadRemoval = 632;
}
/**
* Binder context for this service
*/
private Context mContext;
/**
* listener object for communicating with the mount service daemon
* connectorr object for communicating with vold
*/
private MountListener mListener;
private NativeDaemonConnector mConnector;
/**
* The notification that is shown when a USB mass storage host
@@ -119,12 +139,12 @@ class MountService extends IMountService.Stub {
mContext = context;
// Register a BOOT_COMPLETED handler so that we can start
// MountListener. We defer the startup so that we don't
// our NativeDaemonConnector. We defer the startup so that we don't
// start processing events before we ought-to
mContext.registerReceiver(mBroadcastReceiver,
new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null);
mListener = new MountListener(this);
mConnector = new NativeDaemonConnector(this, "vold", 10, "VoldConnector");
mShowSafeUnmountNotificationWhenUnmounted = false;
mPlaySounds = SystemProperties.get("persist.service.mount.playsnd", "1").equals("1");
@@ -202,7 +222,18 @@ class MountService extends IMountService.Stub {
String action = intent.getAction();
if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
Thread thread = new Thread(mListener, MountListener.class.getName());
/*
* Vold does not run in the simulator, so fake out a mounted
* event to trigger MediaScanner
*/
if ("simulator".equals(SystemProperties.get("ro.product.device"))) {
notifyMediaMounted(
Environment.getExternalStorageDirectory().getPath(), false);
return;
}
Thread thread = new Thread(
mConnector, NativeDaemonConnector.class.getName());
thread.start();
}
}
@@ -258,7 +289,7 @@ class MountService extends IMountService.Stub {
*/
try {
String m = Environment.getExternalStorageDirectory().toString();
unmountMedia(m);
unmountVolume(m);
int retries = 12;
while (!state.equals(Environment.MEDIA_UNMOUNTED) && (retries-- >=0)) {
@@ -302,17 +333,14 @@ class MountService extends IMountService.Stub {
String vs = getVolumeState(vp);
if (enable && vs.equals(Environment.MEDIA_MOUNTED)) {
mListener.unmountVolume(vp);
unmountVolume(vp);
updateUsbMassStorageNotification(true, false);
}
mListener.setShareMethodEnabled(Environment
.getExternalStorageDirectory()
.getPath(),
"ums", enable);
setShareMethodEnabled(vp, "ums", enable);
mUmsEnabled = enable;
if (!enable) {
mountMedia(vp);
mountVolume(vp);
if (mPromptUms) {
updateUsbMassStorageNotification(false, false);
} else {
@@ -352,19 +380,19 @@ class MountService extends IMountService.Stub {
/**
* Attempt to mount external media
*/
public void mountMedia(String mountPath) throws IllegalStateException {
public void mountVolume(String mountPath) throws IllegalStateException {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Requires MOUNT_UNMOUNT_FILESYSTEMS permission");
}
mListener.mountVolume(mountPath);
mConnector.doCommand(String.format("mount %s", mountPath));
}
/**
* Attempt to unmount external media to prepare for eject
*/
public void unmountMedia(String mountPath) throws IllegalStateException {
public void unmountVolume(String mountPath) throws IllegalStateException {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS)
!= PackageManager.PERMISSION_GRANTED) {
@@ -375,23 +403,51 @@ class MountService extends IMountService.Stub {
// to display the notification
mShowSafeUnmountNotificationWhenUnmounted = true;
// tell mountd to unmount the media
mListener.unmountVolume(mountPath);
mConnector.doCommand(String.format("unmount %s", mountPath));
}
/**
* Attempt to format external media
*/
public void formatMedia(String formatPath) throws IllegalStateException {
public void formatVolume(String formatPath) throws IllegalStateException {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Requires MOUNT_FORMAT_FILESYSTEMS permission");
}
mListener.formatVolume(formatPath);
mConnector.doCommand(String.format("format %s", formatPath));
}
boolean getShareAvailable(String method) throws IllegalStateException {
ArrayList<String> rsp = mConnector.doCommand("share_available " + method);
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == VoldResponseCode.ShareAvailabilityResult) {
if (tok[2].equals("available"))
return true;
return false;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
/**
* Enables or disables USB mass storage support.
*
* @param enable true to enable USB mass storage support
*/
void setShareMethodEnabled(String mountPoint, String method,
boolean enable) throws IllegalStateException {
mConnector.doCommand(String.format(
"%sshare %s %s", (enable ? "" : "un"), mountPoint, method));
}
/**
* Returns true if we're playing media notification sounds.
*/
@@ -417,7 +473,7 @@ class MountService extends IMountService.Stub {
Log.w(TAG, "Multiple volumes not currently supported");
return;
}
Log.w(TAG, "State for {" + mountPoint + "} = {" + state + "}");
Log.i(TAG, "State for {" + mountPoint + "} = {" + state + "}");
mLegacyState = state;
}
@@ -455,14 +511,18 @@ class MountService extends IMountService.Stub {
}
}
void onVoldConnected() {
/**
*
* Callback from NativeDaemonConnector
*/
public void onDaemonConnected() {
new Thread() {
public void run() {
try {
if (!getVolumeState(Environment.getExternalStorageDirectory().getPath())
.equals(Environment.MEDIA_MOUNTED)) {
try {
mountMedia(Environment.getExternalStorageDirectory().getPath());
mountVolume(Environment.getExternalStorageDirectory().getPath());
} catch (Exception ex) {
Log.w(TAG, "Connection-mount failed");
}
@@ -474,7 +534,7 @@ class MountService extends IMountService.Stub {
}
try {
boolean avail = mListener.getShareAvailable("ums");
boolean avail = getShareAvailable("ums");
notifyShareAvailabilityChange("ums", avail);
} catch (Exception ex) {
Log.w(TAG, "Failed to get share availability");
@@ -483,6 +543,49 @@ class MountService extends IMountService.Stub {
}.start();
}
/**
*
* Callback from NativeDaemonConnector
*/
public boolean onEvent(int code, String raw, String[] cooked) {
// Log.d(TAG, "event {" + raw + "}");
if (code == VoldResponseCode.VolumeStateChange) {
// FMT: NNN Volume <label> <mountpoint> state changed
// from <old_#> (<old_str>) to <new_#> (<new_str>)
notifyVolumeStateChange(
cooked[2], cooked[3], Integer.parseInt(cooked[7]),
Integer.parseInt(cooked[10]));
} else if (code == VoldResponseCode.VolumeMountFailedBlank) {
// FMT: NNN Volume <label> <mountpoint> mount failed - no supported file-systems
notifyMediaNoFs(cooked[3]);
// FMT: NNN Volume <label> <mountpoint> mount failed - no media
} else if (code == VoldResponseCode.VolumeMountFailedNoMedia) {
notifyMediaRemoved(cooked[3]);
} else if (code == VoldResponseCode.VolumeMountFailedDamaged) {
// FMT: NNN Volume <label> <mountpoint> mount failed - filesystem check failed
notifyMediaUnmountable(cooked[3]);
} else if (code == VoldResponseCode.ShareAvailabilityChange) {
// FMT: NNN Share method <method> now <available|unavailable>
boolean avail = false;
if (cooked[5].equals("available")) {
avail = true;
}
notifyShareAvailabilityChange(cooked[3], avail);
} else if (code == VoldResponseCode.VolumeDiskInserted) {
// FMT: NNN Volume <label> <mountpoint> disk inserted (<major>:<minor>)
notifyMediaInserted(cooked[3]);
} else if (code == VoldResponseCode.VolumeDiskRemoved) {
// FMT: NNN Volume <label> <mountpoint> disk removed (<major>:<minor>)
notifyMediaRemoved(cooked[3]);
} else if (code == VoldResponseCode.VolumeBadRemoval) {
// FMT: NNN Volume <label> <mountpoint> bad removal (<major>:<minor>)
notifyMediaBadRemoval(cooked[3]);
} else {
return false;
}
return true;
}
void notifyVolumeStateChange(String label, String mountPoint, int oldState,
int newState) throws IllegalStateException {
String vs = getVolumeState(mountPoint);
@@ -587,7 +690,7 @@ class MountService extends IMountService.Stub {
new Thread() {
public void run() {
try {
mountMedia(path);
mountVolume(path);
} catch (Exception ex) {
Log.w(TAG, "Failed to mount media on insertion", ex);
}
@@ -903,29 +1006,62 @@ class MountService extends IMountService.Stub {
}
public String[] getSecureContainerList() throws IllegalStateException {
return mListener.listAsec();
ArrayList<String> rsp = mConnector.doCommand("list_asec");
String[] rdata = new String[rsp.size()];
int idx = 0;
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == VoldResponseCode.AsecListResult) {
rdata[idx++] = tok[1];
} else if (code == NativeDaemonConnector.ResponseCode.CommandOkay) {
return rdata;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
public String createSecureContainer(String id, int sizeMb, String fstype,
String key, int ownerUid) throws IllegalStateException {
return mListener.createAsec(id, sizeMb, fstype, key, ownerUid);
String cmd = String.format("create_asec %s %d %s %s %d",
id, sizeMb, fstype, key, ownerUid);
mConnector.doCommand(cmd);
return getSecureContainerPath(id);
}
public void finalizeSecureContainer(String id) throws IllegalStateException {
mListener.finalizeAsec(id);
mConnector.doCommand(String.format("finalize_asec %s", id));
}
public void destroySecureContainer(String id) throws IllegalStateException {
mListener.destroyAsec(id);
mConnector.doCommand(String.format("destroy_asec %s", id));
}
public String mountSecureContainer(String id, String key, int ownerUid) throws IllegalStateException {
return mListener.mountAsec(id, key, ownerUid);
public String mountSecureContainer(String id, String key,
int ownerUid) throws IllegalStateException {
String cmd = String.format("mount_asec %s %s %d",
id, key, ownerUid);
mConnector.doCommand(cmd);
return getSecureContainerPath(id);
}
public String getSecureContainerPath(String id) throws IllegalStateException {
return mListener.getAsecPath(id);
}
ArrayList<String> rsp = mConnector.doCommand("asec_path " + id);
for (String line : rsp) {
String []tok = line.split(" ");
int code = Integer.parseInt(tok[0]);
if (code == VoldResponseCode.AsecPathResult) {
return tok[1];
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
throw new IllegalStateException("Got an empty response");
}
}