org.apache.catalina.ha.deploy
Class FarmWarDeployer

java.lang.Object
  org.apache.catalina.ha.ClusterListener
      org.apache.catalina.ha.deploy.FarmWarDeployer

All Implemented Interfaces:

ClusterDeployer, FileChangeListener, ChannelListener

public class FarmWarDeployer
extends ClusterListener
implements ClusterDeployer, FileChangeListener

A farm war deployer is a class that is able to deploy/undeploy web applications in WAR form within the cluster.

• deployDir - the directory where we watch for changes
• applicationDir - the directory where we install applications
• tempDir - a temporaryDirectory to store binary data when downloading a war from the cluster

Author:

Filip Hanik, Peter Rossbach

log

public static Log log

cluster

protected CatalinaCluster cluster

started

protected boolean started

fileFactories

protected java.util.HashMap fileFactories

deployDir

protected java.lang.String deployDir

tempDir

protected java.lang.String tempDir

watchDir

protected java.lang.String watchDir

watchEnabled

protected boolean watchEnabled

watcher

protected WarWatcher watcher

processDeployFrequency

protected int processDeployFrequency

Frequency of the Farm watchDir check. Cluster wide deployment will be done once for the specified amount of backgrondProcess calls (ie, the lower the amount, the most often the checks will occur).

configBase

protected java.io.File configBase

Path where context descriptors should be deployed.

host

protected Host host

The associated host.

appBase

protected java.io.File appBase

The host appBase.

mBeanServer

protected javax.management.MBeanServer mBeanServer

MBean server.

oname

protected javax.management.ObjectName oname

The associated deployer ObjectName.

FarmWarDeployer

public FarmWarDeployer()

getInfo

public java.lang.String getInfo()

Return descriptive information about this deployer implementation and the corresponding version number, in the format <description>/<version>.

start

public void start()
           throws java.lang.Exception

Description copied from interface: ClusterDeployer

Start the cluster deployer, the owning container will invoke this

Specified by:

start in interface ClusterDeployer

Throws:

java.lang.Exception - - if failure to start cluster

stop

public void stop()
          throws LifecycleException

Description copied from interface: ClusterDeployer

Stops the cluster deployer, the owning container will invoke this

Specified by:

stop in interface ClusterDeployer

Throws:

LifecycleException

cleanDeployDir

public void cleanDeployDir()

messageReceived

public void messageReceived(ClusterMessage msg)

Callback from the cluster, when a message is received, The cluster will broadcast it invoking the messageReceived on the receiver.

Specified by:

messageReceived in class ClusterListener

Parameters:

msg - ClusterMessage - the message received from the cluster

getFactory

public FileMessageFactory getFactory(FileMessage msg)
                              throws java.io.FileNotFoundException,
                                     java.io.IOException

create factory for all transported war files

Parameters:

msg -

Returns:

Factory for all app message (war files)

Throws:

java.io.FileNotFoundException

java.io.IOException

removeFactory

public void removeFactory(FileMessage msg)

Remove file (war) from messages)

Parameters:

msg -

accept

public boolean accept(ClusterMessage msg)

Before the cluster invokes messageReceived the cluster will ask the receiver to accept or decline the message, In the future, when messages get big, the accept method will only take a message header

Specified by:

accept in class ClusterListener

Parameters:

msg - ClusterMessage

Returns:

boolean - returns true to indicate that messageReceived should be invoked. If false is returned, the messageReceived method will not be invoked.

install

public void install(java.lang.String contextPath,
                    java.net.URL war)
             throws java.io.IOException

Install a new web application, whose web application archive is at the specified URL, into this container and all the other members of the cluster with the specified context path. A context path of "" (the empty string) should be used for the root application for this container. Otherwise, the context path must start with a slash.

If this application is successfully installed locally, a ContainerEvent of type INSTALL_EVENT will be sent to all registered listeners, with the newly created Context as an argument.

Specified by:

install in interface ClusterDeployer

Parameters:

contextPath - The context path to which this application should be installed (must be unique)

war - A URL of type "jar:" that points to a WAR file, or type "file:" that points to an unpacked directory structure containing the web application to be installed

Throws:

java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash)

java.lang.IllegalStateException - if the specified context path is already attached to an existing web application

java.io.IOException - if an input/output error was encountered during installation

remove

public void remove(java.lang.String contextPath,
                   boolean undeploy)
            throws java.io.IOException

Remove an existing web application, attached to the specified context path. If this application is successfully removed, a ContainerEvent of type REMOVE_EVENT will be sent to all registered listeners, with the removed Context as an argument. Deletes the web application war file and/or directory if they exist in the Host's appBase.

Specified by:

remove in interface ClusterDeployer

Parameters:

contextPath - The context path of the application to be removed

undeploy - boolean flag to remove web application from server

Throws:

java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash)

java.lang.IllegalArgumentException - if the specified context path does not identify a currently installed web application

java.io.IOException - if an input/output error occurs during removal

fileModified

public void fileModified(java.io.File newWar)

Specified by:

fileModified in interface FileChangeListener

fileRemoved

public void fileRemoved(java.io.File removeWar)

Specified by:

fileRemoved in interface FileChangeListener

getContextName

protected java.lang.String getContextName(java.io.File war)

Create a context path from war

Parameters:

war - War filename

Returns:

'/filename' or if war name is ROOT.war context name is empty string ''

getConfigFile

protected java.lang.String getConfigFile(java.lang.String path)

Given a context path, get the config file name.

getDocBase

protected java.lang.String getDocBase(java.lang.String path)

Given a context path, get the config file name.

getAppBase

protected java.io.File getAppBase()

Return a File object representing the "application root" directory for our associated Host.

remove

protected void remove(java.lang.String path)
               throws java.lang.Exception

Invoke the remove method on the deployer.

Throws:

java.lang.Exception

undeployDir

protected void undeployDir(java.io.File dir)

Delete the specified directory, including all of its contents and subdirectories recursively.

Parameters:

dir - File object representing the directory to be deleted

backgroundProcess

public void backgroundProcess()

Description copied from interface: ClusterDeployer

call from container Background Process

Specified by:

backgroundProcess in interface ClusterDeployer

check

protected void check(java.lang.String name)
              throws java.lang.Exception

Invoke the check method on the deployer.

Throws:

java.lang.Exception

isServiced

protected boolean isServiced(java.lang.String name)
                      throws java.lang.Exception

Invoke the check method on the deployer.

Throws:

java.lang.Exception

addServiced

protected void addServiced(java.lang.String name)
                    throws java.lang.Exception

Invoke the check method on the deployer.

Throws:

java.lang.Exception

removeServiced

protected void removeServiced(java.lang.String name)
                       throws java.lang.Exception

Invoke the check method on the deployer.

Throws:

java.lang.Exception

getCluster

public CatalinaCluster getCluster()

Description copied from interface: ClusterDeployer

Returns the cluster the cluster deployer is associated with

Specified by:

getCluster in interface ClusterDeployer

Overrides:

getCluster in class ClusterListener

Returns:

CatalinaCluster

setCluster

public void setCluster(CatalinaCluster cluster)

Description copied from interface: ClusterDeployer

Associates the cluster deployer with a cluster

Specified by:

setCluster in interface ClusterDeployer

Overrides:

setCluster in class ClusterListener

Parameters:

cluster - CatalinaCluster

equals

public boolean equals(java.lang.Object listener)

Specified by:

equals in interface ChannelListener

Overrides:

equals in class ClusterListener

Parameters:

listener - Object

Returns:

boolean

See Also:

Object.equals(Object)

hashCode

public int hashCode()

Specified by:

hashCode in interface ChannelListener

Overrides:

hashCode in class ClusterListener

Returns:

int

See Also:

Object.hashCode()

getDeployDir

public java.lang.String getDeployDir()

setDeployDir

public void setDeployDir(java.lang.String deployDir)

getTempDir

public java.lang.String getTempDir()

setTempDir

public void setTempDir(java.lang.String tempDir)

getWatchDir

public java.lang.String getWatchDir()

setWatchDir

public void setWatchDir(java.lang.String watchDir)

isWatchEnabled

public boolean isWatchEnabled()

getWatchEnabled

public boolean getWatchEnabled()

setWatchEnabled

public void setWatchEnabled(boolean watchEnabled)

getProcessDeployFrequency

public int getProcessDeployFrequency()

Return the frequency of watcher checks.

setProcessDeployFrequency

public void setProcessDeployFrequency(int processExpiresFrequency)

Set the watcher checks frequency.

Parameters:

processExpiresFrequency - the new manager checks frequency

copy

protected boolean copy(java.io.File from,
                       java.io.File to)

Copy a file to the specified temp directory.

Parameters:

from - copy from temp

to - to host appBase directory

Returns:

true, copy successful