com.gemstone.gemfire.internal.ManagerInfo Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal;
import com.gemstone.gemfire.*;
import com.gemstone.gemfire.i18n.LogWriterI18n;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import java.io.*;
import java.net.InetAddress;
/**
* Represents the information about the manager that is stored
* in its SystemAdmin manager VM's main thread.
* For internal use only.
*
* @author darrel
*
*/
public class ManagerInfo implements DataSerializable {
private static final long serialVersionUID = 5792809580026325378L;
/**
* The name of the file the locator will create when
* the system is started. It will be deleted when the system
* is stopped. It contains a single serialize copy of
* {@link ManagerInfo}. The file will always be located in
* the system directory.
*/
private static final String LOCATOR_INFO_FILE_NAME = ".locator";
/**
* The status code constant that means the system is stopped.
*
Current value is 0.
*/
public static final int STOPPED_STATUS_CODE = 0;
/**
* The status code constant that means the system is stopping.
*
Current value is 1.
*/
public static final int STOPPING_STATUS_CODE = 1;
/**
* The status code constant that means the system was killed.
*
Current value is 2.
*/
public static final int KILLED_STATUS_CODE = 2;
/**
* The status code constant that means the system is starting.
*
Current value is 3.
*/
public static final int STARTING_STATUS_CODE = 3;
/**
* The status code constant that means the system is started.
*
Current value is 4.
*/
public static final int STARTED_STATUS_CODE = 4;
public static void setLocatorStarted(File directory, int port, InetAddress bindAddress) {
ManagerInfo.saveManagerInfo(OSProcess.getId(), STARTED_STATUS_CODE, directory, port, bindAddress);
}
public static File setLocatorStarting(File directory, LogWriterI18n log, int port, InetAddress bindAddress) {
if (ManagerInfo.isManagerRunning(directory, true)) {
throw new SystemIsRunningException(LocalizedStrings.ManagerInfo_0_1_IS_ALREADY_RUNNING.toLocalizedString(new Object[] {"Locator", directory.getPath()}));
}
File result = getManagerInfoFile(directory, true);
ManagerInfo.saveManagerInfo(OSProcess.getId(), STARTING_STATUS_CODE, directory, port, bindAddress);
return result;
}
// fix for bug #44059. store the port and address for the locator in the persistent information
// so we can use "-dir" to stop the locator.
public static void setLocatorStopping(File directory, int port, InetAddress bindAddress) {
ManagerInfo.saveManagerInfo(OSProcess.getId(), STOPPING_STATUS_CODE, directory, port, bindAddress);
}
/**
* Saves the manager information to the info
* file in the given directory.
* @param pid the process id of the manager VM.
* @param status the status of the manager
* @param directory the manager's directory.
* @param port the tcp/ip port for the locator
* @param bindAddress the tcp/ip address for the locator
* @throws GemFireIOException if the file could not be written.
*/
private static void saveManagerInfo(int pid, int status, File directory, int port, InetAddress bindAddress) {
ManagerInfo info = new ManagerInfo(pid, status, port, bindAddress);
File infoFile = getManagerInfoFile(directory, true);
try {
FileOutputStream ostream = new FileOutputStream(infoFile);
DataOutputStream dos = new DataOutputStream(ostream);
DataSerializer.writeObject(info, dos);
ostream.close();
} catch (IOException io) {
throw new GemFireIOException(LocalizedStrings.ManagerInfo_COULD_NOT_WRITE_FILE_0.toLocalizedString(infoFile), io);
}
}
/**
* Gets the process ID of the manager.
*/
public int getManagerProcessId() {
return this.managerPid;
}
/**
* Gets the status of the manager.
*/
public int getManagerStatus() {
return this.managerStatus;
}
/**
* get the port number of the manager
*/
public int getManagerPort() {
return this.port;
}
/**
* get the bind address of the manager
*/
public InetAddress getManagerAddress() {
return this.bindAddress;
}
static final String[] statusNames = new String[] {
LocalizedStrings.ManagerInfo_STOPPED.toLocalizedString(),
LocalizedStrings.ManagerInfo_STOPPING.toLocalizedString(),
LocalizedStrings.ManagerInfo_KILLED.toLocalizedString(),
LocalizedStrings.ManagerInfo_STARTING.toLocalizedString(),
LocalizedStrings.ManagerInfo_RUNNING.toLocalizedString()
};
/**
* Gets the string representation for the given status int code.
*/
public static String statusToString(int status) {
return statusNames[status];
}
/**
* Gets the status code for the given statusName.
* @throws IllegalArgumentException if an unknown status name is given.
*/
public static int statusNameToCode(String statusName) {
for (int i=STOPPED_STATUS_CODE; i <= STARTED_STATUS_CODE; i++) {
if (statusNames[i].equalsIgnoreCase(statusName)) {
return i;
}
}
throw new IllegalArgumentException(LocalizedStrings.ManagerInfo_UNKNOWN_STATUSNAME_0.toLocalizedString(statusName));
}
public static ManagerInfo loadLocatorInfo(File directory) {
return loadManagerInfo(directory, true);
}
private static ManagerInfo loadManagerInfo(File directory, boolean locator) {
if (!directory.exists() || !directory.isDirectory()) {
throw new UncreatedSystemException(LocalizedStrings.ManagerInfo__0_DOES_NOT_EXIST_OR_IS_NOT_A_DIRECTORY.toLocalizedString(directory.getPath()));
}
File infoFile = getManagerInfoFile(directory, locator);
if (!infoFile.exists()) {
throw new UnstartedSystemException(LocalizedStrings.ManagerInfo_THE_INFO_FILE_0_DOES_NOT_EXIST.toLocalizedString(infoFile.getPath()));
}
try {
FileInputStream fis = new FileInputStream(infoFile);
if (fis.available() == 0) {
throw new GemFireIOException(LocalizedStrings.ManagerInfo_COULD_NOT_LOAD_FILE_0_BECAUSE_THE_FILE_IS_EMPTY_WAIT_FOR_THE_1_TO_FINISH_STARTING.toLocalizedString(new Object[] {infoFile, (locator ? "locator" : "system")}), null);
}
DataInputStream dis = new DataInputStream(fis);
ManagerInfo result =
(ManagerInfo) DataSerializer.readObject(dis);
fis.close();
return result;
} catch (IOException io) {
throw new GemFireIOException(LocalizedStrings.ManagerInfo_COULD_NOT_LOAD_FILE_0.toLocalizedString(infoFile), io);
} catch (ClassNotFoundException ex) {
throw new GemFireIOException(LocalizedStrings.ManagerInfo_COULD_NOT_LOAD_FILE_0_BECAUSE_A_CLASS_COULD_NOT_BE_FOUND.toLocalizedString(infoFile), ex);
}
}
public static File getLocatorInfoFile(File directory) {
return getManagerInfoFile(directory, true);
}
private static File getManagerInfoFile(File directory, boolean locator) {
if (!locator) {
throw new IllegalArgumentException(LocalizedStrings.ManagerInfo_ONLY_LOCATORS_ARE_SUPPORTED.toLocalizedString());
}
File res = new File(directory, LOCATOR_INFO_FILE_NAME);
try {
res = res.getCanonicalFile();
} catch (IOException ex) {
res = res.getAbsoluteFile();
}
return res;
}
public static String getLocatorStatusCodeString(File directory) {
return statusToString(getLocatorStatusCode(directory));
}
public static int getLocatorStatusCode(File directory) {
return getManagerStatusCode(directory, true);
}
private static int getManagerStatusCode(File directory, boolean locator) {
boolean interrupted = false;
try {
ManagerInfo mi = ManagerInfo.loadManagerInfo(directory, locator);
if (!PureJavaMode.isPure() && !OSProcess.exists(mi.getManagerProcessId())) {
return KILLED_STATUS_CODE;
} else {
return mi.getManagerStatus();
}
} catch (UnstartedSystemException ex) {
return STOPPED_STATUS_CODE;
} catch (GemFireIOException ex) {
// wait a bit and try again in case we caught the manager rewriting
// its info file
try {Thread.sleep(1000);}
catch (InterruptedException ignore) {
interrupted = true;
}
try {
ManagerInfo.loadManagerInfo(directory, locator);
// all is well so do a recursive call
return getManagerStatusCode(directory, locator);
} catch (UnstartedSystemException ignore) {
return STOPPED_STATUS_CODE;
} catch (GemFireIOException ex2) {
// give up. The info file is probably corrupt
throw ex2;
}
}
finally {
if (interrupted) {
Thread.currentThread().interrupt();
}
}
}
public static boolean isLocatorStarted(File directory) {
return isManagerStarted(directory, true);
}
private static boolean isManagerStarted(File directory, boolean locator) {
try {
ManagerInfo mi = loadManagerInfo(directory, locator);
int status = mi.getManagerStatus();
if (status != STARTED_STATUS_CODE) {
return false;
}
// Check to see if manager process exists, assume it is for PureJava
if (PureJavaMode.isPure() || OSProcess.exists(mi.getManagerProcessId())) {
return true;
}
return false;
} catch (UnstartedSystemException ignore) {
return false;
} catch (GemFireIOException ex) {
Throwable cause = ex.getCause();
if (cause == null) {
// this happens when the file was zero size
return false;
} else if (cause instanceof InvalidClassException) {
// This happens when we have a serialVersionUID mismatch.
// We don't want to hide this so throw the exception
throw ex;
} else {
return false;
}
}
}
public static boolean isLocatorRunning(File directory) {
return isManagerRunning(directory, true);
}
private static boolean isManagerRunning(File directory, boolean locator) {
try {
ManagerInfo mi = loadManagerInfo(directory, locator);
int status = mi.getManagerStatus();
if (status != STARTED_STATUS_CODE
&& status != STARTING_STATUS_CODE
&& status != STOPPING_STATUS_CODE) {
return false;
}
// Check to see if manager process exists
if (!PureJavaMode.isPure() && !OSProcess.exists(mi.getManagerProcessId())) {
return false;
}
return true;
} catch (UnstartedSystemException ignore) {
return false;
} catch (GemFireIOException ex) {
Throwable cause = ex.getCause();
if (cause == null) {
// this happens when the file was zero size
// This indicates the manager is changing its info file
return true;
} else if (cause instanceof InvalidClassException) {
// This happens when we have a serialVersionUID mismatch.
// We don't want to hide this so throw the exception
throw ex;
} else {
// This indicates the manager is changing its info file
return true;
}
}
}
public static boolean isLocatorStopped(File directory) {
return isManagerStopped(directory, true);
}
private static boolean isManagerStopped(File directory, boolean locator) {
try {
ManagerInfo mi = loadManagerInfo(directory, locator);
if (!OSProcess.exists(mi.getManagerProcessId())) {
return true;
}
return false;
} catch (UnstartedSystemException ignore) {
return true;
} catch (GemFireIOException ex) {
Throwable cause = ex.getCause();
if (cause == null) {
// this happens when the file was zero size
return false;
} else if (cause instanceof InvalidClassException) {
// This happens when we have a serialVersionUID mismatch.
// We don't want to hide this so throw the exception
throw ex;
} else {
return false;
}
}
}
/**
* Constructs a manager info instance given the process id
* of the manager VM.
* @param port TODO
* @param bindAddress TODO
*/
private ManagerInfo(int pid, int status, int port, InetAddress bindAddress) {
this.managerPid = pid;
this.managerStatus = status;
this.port = port;
this.bindAddress = bindAddress;
}
/**
* Constructor for DataSerializable
*/
public ManagerInfo() { }
// instance variables
private int managerPid;
private int managerStatus;
private int port;
private InetAddress bindAddress;
public void toData(DataOutput out) throws IOException {
out.writeInt(this.managerPid);
out.writeInt(this.managerStatus);
out.writeInt(this.port);
if (this.bindAddress == null) {
out.writeByte(0);
} else {
byte[] address = this.bindAddress.getAddress();
out.writeByte(address.length);
out.write(address, 0, address.length);
}
}
public void fromData(DataInput in)
throws IOException, ClassNotFoundException {
this.managerPid = in.readInt();
this.managerStatus = in.readInt();
this.port = in.readInt();
byte len = in.readByte();
if (len > 0) {
byte[] addr = new byte[len];
in.readFully(addr);
this.bindAddress = InetAddress.getByAddress(addr);
}
}
}