FarmWarDeployer (Apache Tomcat 6.0.51 API Documentation)
Keywords: org.apache.catalina.ha.deploy.FarmWarDeployer class

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## 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.

Any host can act as the admin, and will have three directories

- 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

Currently we only support deployment of WAR files since they are easier to send across the wire.

Author:
  Filip Hanik, Peter Rossbach

Field Summary
`protected java.io.File` | `appBase` The host appBase.
`protected CatalinaCluster` | `cluster`
`protected java.io.File` | `configBase` Path where context descriptors should be deployed.
`protected java.lang.String` | `deployDir`
`protected java.util.HashMap` | `fileFactories`
`protected Host` | `host` The associated host.
`static Log` | `log`
`protected javax.management.MBeanServer` | `mBeanServer` MBean server.
`protected javax.management.ObjectName` | `oname` The associated deployer ObjectName.
`protected int` | `processDeployFrequency` Frequency of the Farm watchDir check.
`protected boolean` | `started`
`protected java.lang.String` | `tempDir`
`protected java.lang.String` | `watchDir`
`protected boolean` | `watchEnabled`
`protected WarWatcher` | `watcher`

Fields inherited from class org.apache.catalina.ha.ClusterListener
`sm`

Constructor Summary
`FarmWarDeployer()`

Method Summary
`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
`protected void` | `addServiced(java.lang.String name)` Invoke the check method on the deployer.
`void` | `backgroundProcess()` call from container Background Process
`protected void` | `check(java.lang.String name)` Invoke the check method on the deployer.
`void` | `cleanDeployDir()`
`protected boolean` | `copy(java.io.File from, java.io.File to)` Copy a file to the specified temp directory.
`boolean` | `equals(java.lang.Object listener)`
`void` | `fileModified(java.io.File newWar)`
`void` | `fileRemoved(java.io.File removeWar)`
`protected java.io.File` | `getAppBase()` Return a File object representing the "application root" directory for our associated Host.
`CatalinaCluster` | `getCluster()` Returns the cluster the cluster deployer is associated with
`protected java.lang.String` | `getConfigFile(java.lang.String path)` Given a context path, get the config file name.
`protected java.lang.String` | `getContextName(java.io.File war)` Create a context path from war
`java.lang.String` | `getDeployDir()`
`protected java.lang.String` | `getDocBase(java.lang.String path)` Given a context path, get the config file name.
`FileMessageFactory` | `getFactory(FileMessage msg)` create factory for all transported war files
`java.lang.String` | `getInfo()` Return descriptive information about this deployer implementation and the corresponding version number, in the format `<description>/<version>`.
`int` | `getProcessDeployFrequency()` Return the frequency of watcher checks.
`java.lang.String` | `getTempDir()`
`java.lang.String` | `getWatchDir()`
`boolean` | `getWatchEnabled()`
`int` | `hashCode()`
`void` | `install(java.lang.String contextPath, java.net.URL war)` 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.
`protected boolean` | `isServiced(java.lang.String name)` Invoke the check method on the deployer.
`boolean` | `isWatchEnabled()`
`void` | `messageReceived(ClusterMessage msg)` Callback from the cluster, when a message is received, The cluster will broadcast it invoking the messageReceived on the receiver.
`protected void` | `remove(java.lang.String path)` Invoke the remove method on the deployer.
`void` | `remove(java.lang.String contextPath, boolean undeploy)` Remove an existing web application, attached to the specified context path.
`void` | `removeFactory(FileMessage msg)` Remove file (war) from messages)
`protected void` | `removeServiced(java.lang.String name)` Invoke the check method on the deployer.
`void` | `setCluster(CatalinaCluster cluster)` Associates the cluster deployer with a cluster
`void` | `setDeployDir(java.lang.String deployDir)`
`void` | `setProcessDeployFrequency(int processExpiresFrequency)` Set the watcher checks frequency.
`void` | `setTempDir(java.lang.String tempDir)`
`void` | `setWatchDir(java.lang.String watchDir)`
`void` | `setWatchEnabled(boolean watchEnabled)`
`void` | `start()` Start the cluster deployer, the owning container will invoke this
`void` | `stop()` Stops the cluster deployer, the owning container will invoke this
`protected void` | `undeployDir(java.io.File dir)` Delete the specified directory, including all of its contents and subdirectories recursively.

Methods inherited from class org.apache.catalina.ha.ClusterListener
`accept, messageReceived`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.apache.catalina.tribes.ChannelListener
`accept, messageReceived`

Field Detail

### 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.

Constructor Detail

### FarmWarDeployer

    public FarmWarDeployer()

Method Detail

### 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

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