com.endeca.soleng.eac.toolkit.component
Class Component

java.lang.Object
  com.endeca.soleng.eac.toolkit.base.EacElement
      com.endeca.soleng.eac.toolkit.base.Provisionable
          com.endeca.soleng.eac.toolkit.component.Component

Direct Known Subclasses:

BatchComponent, ServerComponent

public class Component
extends Provisionable

Component is the provisionable object from which all components inherit. This object exposes methods for interacting with the EAC's component control web service to start, stop and request the status of components.

Author:

sshusteff

Field Summary

Fields inherited from class com.endeca.soleng.eac.toolkit.base.EacElement

appName, dataPrefix, eacHost, eacPort, elementId, lockManager, logDir, sslEnabled, workingDir

Constructor Summary

Component()

Method Summary

void	archiveLogDir() Creates a backup of the components log directory (i.e.
com.endeca.eac.client.ComponentType	buildEacStub() Builds a ComponentType object to send to the EAC.
void	cleanDir(java.lang.String dir) Cleans all contents for the target directory, if the specified path is not null or empty.
Utility	constructArchiveLogDir() Construct utility for archiving the log directory or, if number of archives is configured to be "-1" (indicating the user wants to clear the log directory, but not archive the logs), this method constructs a utility to clean the log directory.
CleanDirUtility	constructCleanDir(java.lang.String dir) Construct utility for cleaning the specified directory.
java.util.Map<java.lang.String,java.lang.String>	getCustomDirectories()
protected java.util.List<java.lang.String>	getDirProperties() Retrieves a list of properties assumed to be custom directory definitions, based on the convention that the property name ends with "dir" or "Dir."
Host	getHost()
java.lang.String	getHostId()
long	getLongPropertyValueOrDefault(java.lang.String propName, long defaultValue)
long	getMaxMissedStatusChecksAllowed()
long	getMaxWaitTimeSeconds()
long	getMinWaitTimeSeconds()
int	getNumLogBackups() Retrieves the number of log archives configured as a property in the app configuration.
int	getNumMissedStatusChecks()
java.util.Map<java.lang.String,java.lang.String>	getProperties()
java.lang.String	getProperty(java.lang.String propName) Retrieves the value of the property with the specified name from the provisioned component.
long	getSlowPollingIntervalMs()
long	getStandardPollingIntervalMs()
com.endeca.eac.client.StateType	getStatus() Retrieves the status of the component.
void	incrementMissedStatusQueries()
protected void	initializeEacStub(com.endeca.eac.client.ComponentType stub)
boolean	isActive() Returns true if the component is active (i.e.
boolean	isDefined() Checks whether the component is defined in the EAC.
boolean	isDefinitionChanged() Compares the definition of the component in the EAC to the local definition.
boolean	isFailed() Returns true if the component failed when it was run most recently.
boolean	isHotUpdateDefinitionChange() Method to test whether a definition change requires stopping the component or whether it can be performed as a "hot update." This implementation assumes that the only hot update that's possible is a change to the properties.
boolean	isSkipTestingForFilesDuringCleanup() Retrieves the boolean indicating whether directory cleanup should use the default behavior of first testing for non-empty directory contents, or if that test should be skipped.
void	removeDefinition() Removes the EAC provisioning of this component.
void	setCustomDirectories(java.util.Map<java.lang.String,java.lang.String> customDirectories)
void	setDefinition() Sets the EAC provisioning of this component, building the definition from the information in this object.
void	setDefinition(com.endeca.eac.client.ComponentType componentType) Sets the EAC provisioning of this component to the ComponentType WSDL stub object passed as a parameter.
void	setHost(Host host)
void	setHostId(java.lang.String hostId)
void	setNumMissedStatusChecks(int numMissedStatusQueries)
void	setProperties(java.util.Map<java.lang.String,java.lang.String> properties)
void	start() Starts the component.
void	stop() Stops the component.
void	updateDefinition() Updates the EAC provisioning of this component.
void	updateEacDefinition() Updates the EAC provisioning of this component, building the definition from this object.
void	updateEacDefinition(com.endeca.eac.client.ComponentType componentType) Updates the EAC provisioning of this component with the specified component type.
boolean	waitForFinished() Waits for the component to finish, by polling for its status every second, until the maximum wait time has elapsed.

Methods inherited from class com.endeca.soleng.eac.toolkit.base.Provisionable

getAppDefinitionFromEac, getCachedAppDefinition, getProvisioningPort, invalidateCachedAppDefinition, setCachedAppDefinition

Methods inherited from class com.endeca.soleng.eac.toolkit.base.EacElement

getAppName, getDataPrefix, getEacHost, getEacPort, getElementId, getLockManager, getLogDir, getWorkingDir, isSslEnabled, setAppName, setDataPrefix, setEacHost, setEacPort, setElementId, setLockManager, setLogDir, setSslEnabled, setWorkingDir

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Component

public Component()

Method Detail

start

public void start()
           throws EacCommunicationException,
                  EacComponentControlException

Starts the component.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to start the component.

stop

public void stop()
          throws EacCommunicationException,
                 EacComponentControlException

Stops the component.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to stop the component.

getStatus

public com.endeca.eac.client.StateType getStatus()
                                          throws EacCommunicationException,
                                                 EacComponentControlException

Retrieves the status of the component.

Returns:

Returns a String representation of the component's status.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to check the status of the component.

waitForFinished

public boolean waitForFinished()
                        throws EacCommunicationException,
                               EacComponentControlException

Waits for the component to finish, by polling for its status every second, until the maximum wait time has elapsed. If the component hasn't stopped after the maximum wait time elapses, this method returns false. If a minimum wait time has been specified, this method will poll once per minute until the minimum wait time has been reached and then will begin polling once per second until the component finishes or the maximum wait time has elapsed.

Returns:

Returns true if the component finished within the allotted wait time.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to check the status of the component.

isActive

public boolean isActive()
                 throws EacCommunicationException,
                        EacComponentControlException

Returns true if the component is active (i.e. not failed or stopped).

Returns:

Returns true of the component is active.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to check the status of the component.

isFailed

public boolean isFailed()
                 throws EacCommunicationException,
                        EacComponentControlException

Returns true if the component failed when it was run most recently.

Returns:

Returns true of the component failed.

Throws:

EacCommunicationException - If a communication error occurs while requesting the status of the component from the EAC.

EacComponentControlException - If an error occurs while trying to check the status of the component.

archiveLogDir

public void archiveLogDir()
                   throws AppConfigurationException,
                          EacCommunicationException,
                          EacComponentControlException,
                          java.lang.InterruptedException

Creates a backup of the components log directory (i.e. the directory in which the log file is being saved). If numLogBackups is "-1", this call will clear the log directory instead of archiving it. This setting is useful during development for ensuring logs don't append indefinitely, but saving space by not creating unwanted archives. If numLogBackups is less than -1 or zero, no action is taken.

Throws:

AppConfigurationException - If there is insufficient or invalid configuration for the utility..

EacCommunicationException - If a communication error occurs while running the backup.

EacComponentControlException - If an error occurs while running the backup.

java.lang.InterruptedException - If the thread is interrupted while waiting for the backup to finish.

constructArchiveLogDir

public Utility constructArchiveLogDir()
                               throws AppConfigurationException

Construct utility for archiving the log directory or, if number of archives is configured to be "-1" (indicating the user wants to clear the log directory, but not archive the logs), this method constructs a utility to clean the log directory.

Returns:

Null if log directory is null/empty or if numLogBackups is invalid (less than -1 or 0). CleanDirUtility to clean the log dir if numLogBackups is "-1". BackupUtility to archive the log directory, if numLogBackups is greater than zero.

Throws:

AppConfigurationException

cleanDir

public void cleanDir(java.lang.String dir)
              throws AppConfigurationException,
                     EacCommunicationException,
                     EacComponentControlException

Cleans all contents for the target directory, if the specified path is not null or empty. Path is not resolved or made absolute, so must be absolute or must be relative to the component's working dir. All dir contents/subdirs are removed. In fact, the implementation will remove the directroy and all its contents recursively, then re-create the empty directory.

Parameters:

dir - Directory to clean.

Throws:

AppConfigurationException

EacCommunicationException

EacComponentControlException

constructCleanDir

public CleanDirUtility constructCleanDir(java.lang.String dir)
                                  throws AppConfigurationException

Construct utility for cleaning the specified directory. Does not resolve or try to make the path absolute, just checks that it is not a null or empty string. This will typically mean that the directory needs to be an absolute path, or is relative to this component's working directory.

Parameters:

dir - Directory to clean.

Returns:

CleanDirUtility for cleaning the target directory, or null if dir argument is null/empty.

Throws:

AppConfigurationException

getDirProperties

protected java.util.List<java.lang.String> getDirProperties()

Retrieves a list of properties assumed to be custom directory definitions, based on the convention that the property name ends with "dir" or "Dir."

Returns:

Returns a list of directory properties or an empty list if no properties are defined that match the directory naming convention.

getProperty

public java.lang.String getProperty(java.lang.String propName)

Retrieves the value of the property with the specified name from the provisioned component. Properties are arbitrary key/value pairs defined for provisioned hosts and components.

Parameters:

propName - Name of the property whose value will be retrieved.

Returns:

Returns the property value or null, if the property is not found.

isDefinitionChanged

public boolean isDefinitionChanged()
                            throws EacCommunicationException,
                                   EacProvisioningException

Compares the definition of the component in the EAC to the local definition.

Specified by:

isDefinitionChanged in class Provisionable

Returns:

Returns true if the component definition has changed.

Throws:

EacCommunicationException - If a communication error occurs while retrieving the provisioning port.

EacProvisioningException - If an error occurs while trying to retrieve the component definition from the EAC.

isDefined

public boolean isDefined()
                  throws EacCommunicationException,
                         EacProvisioningException

Checks whether the component is defined in the EAC.

Specified by:

isDefined in class Provisionable

Returns:

Returns true if the component is provisioned.

Throws:

EacCommunicationException - If a communication error occurs while retrieving the provisioning port.

EacProvisioningException - If an error occurs while trying to retrieve the component definition from the EAC.

updateDefinition

public void updateDefinition()
                      throws EacCommunicationException,
                             EacComponentControlException,
                             EacProvisioningException

Updates the EAC provisioning of this component. If the component is active, this method will stop it, re-define it and attempt to re-start it. If the update can be performed without stopping the component, this method will do so. If a stopped component fails to restart, a warning is logged, but execution continues. This is a likely scenario for changes like a component moving to a new host. For example, a dgraph will not restart on a new host until its index is moved to the new host.

Specified by:

updateDefinition in class Provisionable

Throws:

EacComponentControlException - If an error occurs while trying to start, stop or check the status of the component.

EacCommunicationException - If a communication error occurs while retrieving the provisioning port.

EacProvisioningException

isHotUpdateDefinitionChange

public boolean isHotUpdateDefinitionChange()
                                    throws EacCommunicationException,
                                           EacProvisioningException

Method to test whether a definition change requires stopping the component or whether it can be performed as a "hot update." This implementation assumes that the only hot update that's possible is a change to the properties.

Returns:

Returns true if the definition can be updated while the component is active.

Throws:

EacProvisioningException

EacCommunicationException

removeDefinition

public void removeDefinition()
                      throws EacCommunicationException,
                             EacComponentControlException

Removes the EAC provisioning of this component. If the component is active, this method will stop it.

Specified by:

removeDefinition in class Provisionable

Throws:

EacComponentControlException - If an error occurs while trying to stop the component.

EacCommunicationException - If a communication error occurs while retrieving the provisioning port.

setDefinition

public void setDefinition()
                   throws EacCommunicationException

Sets the EAC provisioning of this component, building the definition from the information in this object.

Specified by:

setDefinition in class Provisionable

Throws:

EacCommunicationException - If a communication error occurs while removing the component.

setDefinition

public void setDefinition(com.endeca.eac.client.ComponentType componentType)
                   throws EacCommunicationException

Sets the EAC provisioning of this component to the ComponentType WSDL stub object passed as a parameter.

Parameters:

componentType - Definition to set in the EAC.

Throws:

EacCommunicationException - If a communication error occurs while removing the component.

updateEacDefinition

public void updateEacDefinition()
                         throws EacCommunicationException,
                                EacProvisioningException

Updates the EAC provisioning of this component, building the definition from this object.

Throws:

EacCommunicationException

EacProvisioningException

updateEacDefinition

public void updateEacDefinition(com.endeca.eac.client.ComponentType componentType)
                         throws EacCommunicationException,
                                EacProvisioningException

Updates the EAC provisioning of this component with the specified component type. This action will not be forced, as it should only occur when the component is inactive or when the component is active but the change can be applied as a hot update.

Throws:

EacCommunicationException

EacProvisioningException

buildEacStub

public com.endeca.eac.client.ComponentType buildEacStub()

Builds a ComponentType object to send to the EAC. If necessary, translates or transforms fields to match the EAC's requirements.

Returns:

Returns the ComponentType WSDL stub object for this Component.

initializeEacStub

protected void initializeEacStub(com.endeca.eac.client.ComponentType stub)

getNumLogBackups

public int getNumLogBackups()

Retrieves the number of log archives configured as a property in the app configuration. If no value exists or if the value is not a number, returns 0.

Returns:

Returns the number of log archives to keep or zero.

isSkipTestingForFilesDuringCleanup

public boolean isSkipTestingForFilesDuringCleanup()

Retrieves the boolean indicating whether directory cleanup should use the default behavior of first testing for non-empty directory contents, or if that test should be skipped. If no value exists or if the value does not parse as a boolean, the default value of "false" is returned. If "true" is specified, CleanDirUtility invocations will skip the test and will attempt to clean directories even if they are empty.

Returns:

Returns boolean indicator of whether cleanup should skip checking directory contents, as configured in property "skipTestingForFilesDuringCleanup."

getCustomDirectories

public java.util.Map<java.lang.String,java.lang.String> getCustomDirectories()

setCustomDirectories

public void setCustomDirectories(java.util.Map<java.lang.String,java.lang.String> customDirectories)

getProperties

public java.util.Map<java.lang.String,java.lang.String> getProperties()

setProperties

public void setProperties(java.util.Map<java.lang.String,java.lang.String> properties)

getHostId

public java.lang.String getHostId()

setHostId

public void setHostId(java.lang.String hostId)

getHost

public Host getHost()

setHost

public void setHost(Host host)

getLongPropertyValueOrDefault

public long getLongPropertyValueOrDefault(java.lang.String propName,
                                          long defaultValue)

getMaxMissedStatusChecksAllowed

public long getMaxMissedStatusChecksAllowed()

getStandardPollingIntervalMs

public long getStandardPollingIntervalMs()

getSlowPollingIntervalMs

public long getSlowPollingIntervalMs()

getMinWaitTimeSeconds

public long getMinWaitTimeSeconds()

getMaxWaitTimeSeconds

public long getMaxWaitTimeSeconds()

getNumMissedStatusChecks

public int getNumMissedStatusChecks()

setNumMissedStatusChecks

public void setNumMissedStatusChecks(int numMissedStatusQueries)

incrementMissedStatusQueries

public void incrementMissedStatusQueries()