org.rhq.plugins.apache
Class ApacheServerComponent

java.lang.Object
  org.rhq.plugins.apache.ApacheServerComponent

All Implemented Interfaces:

AvailabilityFacet, ConfigurationFacet, ConfigurationFacetSupport, CreateChildResourceFacet, ResourceComponent<PlatformComponent>, MeasurementFacet, OperationFacet, AugeasRHQComponent<PlatformComponent>

public class ApacheServerComponent
extends Object
implements AugeasRHQComponent<PlatformComponent>, MeasurementFacet, OperationFacet, ConfigurationFacet, CreateChildResourceFacet

The resource component for Apache 2.x servers.

Author:

Ian Springer, Lukas Krejci

Field Summary

static String	AUGEAS_ENABLED
static String	AUXILIARY_INDEX_PROP
static String	CONFIGURATION_NOT_SUPPORTED_ERROR_MESSAGE
static String	DEFAULT_ERROR_LOG_PATH
static String	DEFAULT_EXECUTABLE_PATH
static String	PLUGIN_CONFIG_CUSTOM_MODULE_NAMES
static String	PLUGIN_CONFIG_MODULE_MAPPING
static String	PLUGIN_CONFIG_MODULE_NAME
static String	PLUGIN_CONFIG_MODULE_SOURCE_FILE
static String	PLUGIN_CONFIG_PROP_CONTROL_SCRIPT_PATH
static String	PLUGIN_CONFIG_PROP_ERROR_LOG_EVENTS_ENABLED
static String	PLUGIN_CONFIG_PROP_ERROR_LOG_FILE_PATH
static String	PLUGIN_CONFIG_PROP_ERROR_LOG_INCLUDES_PATTERN
static String	PLUGIN_CONFIG_PROP_ERROR_LOG_MINIMUM_SEVERITY
static String	PLUGIN_CONFIG_PROP_EXECUTABLE_PATH
static String	PLUGIN_CONFIG_PROP_HTTPD_CONF
static String	PLUGIN_CONFIG_PROP_RESTART_AFTER_CONFIG_UPDATE
static String	PLUGIN_CONFIG_PROP_SERVER_ROOT
static String	PLUGIN_CONFIG_PROP_SNMP_AGENT_COMMUNITY
static String	PLUGIN_CONFIG_PROP_SNMP_AGENT_HOST
static String	PLUGIN_CONFIG_PROP_SNMP_AGENT_PORT
static String	PLUGIN_CONFIG_PROP_URL
static String	PLUGIN_CONFIG_PROP_VHOST_CREATION_POLICY
static String	PLUGIN_CONFIG_PROP_VHOST_FILES_MASK
static String	PLUGIN_CONFIG_VHOST_IN_SINGLE_FILE_PROP_VALUE
static String	PLUGIN_CONFIG_VHOST_PER_FILE_PROP_VALUE
static String	SERVER_BUILT_TRAIT

Constructor Summary

ApacheServerComponent()

Method Summary

void	conditionalRestart() Conditionally restarts the server based on the settings in the plugin configuration of the server.
CreateResourceReport	createResource(CreateResourceReport report)
void	deleteEmptyFile(AugeasTree tree, AugeasNode deletedNode) This method checks whether the supplied node that has been deleted from the tree didn't leave the file it was contained in empty.
void	finishChildResourceCreate(CreateResourceReport report) This method is akin to finishConfigurationUpdate(ConfigurationUpdateReport) but should be used in the createResource(CreateResourceReport) method.
void	finishConfigurationUpdate(ConfigurationUpdateReport report) This method is supposed to be called from updateResourceConfiguration(ConfigurationUpdateReport) of this resource and any child resources.
HttpdAddressUtility	getAddressUtility()
AugeasProxy	getAugeasProxy()
AugeasTree	getAugeasTree()
AvailabilityType	getAvailability()
ConfigurationTimestamp	getConfigurationTimestamp()
File	getControlScriptPath() Return the absolute path of this Apache server's control script (e.g.
ApacheBinaryInfo	getCurrentBinaryInfo()
ProcessInfo	getCurrentProcessInfo()
File	getExecutablePath() Return the absolute path of this Apache server's executable (e.g.
File	getHttpdConfFile() Returns the httpd.conf file
Map<String,String>	getModuleNames()
File	getServerRoot() Return the absolute path of this Apache server's server root (e.g.
String	getServerUrl()
SNMPSession	getSNMPSession() Returns an SNMP session that can be used to communicate with this server's SNMP agent.
static SNMPSession	getSNMPSession(SNMPClient snmpClient, Configuration pluginConfig)
void	getValues(MeasurementReport report, Set<MeasurementScheduleRequest> schedules)
OperationResult	invokeOperation(String name, Configuration params)
boolean	isAugeasEnabled()
ApacheDirectiveTree	loadParser()
Configuration	loadResourceConfiguration()
void	start(ResourceContext<PlatformComponent> resourceContext)
void	stop()
void	updateResourceConfiguration(ConfigurationUpdateReport report)

Methods inherited from class java.lang.Object

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

Field Detail

CONFIGURATION_NOT_SUPPORTED_ERROR_MESSAGE

public static final String CONFIGURATION_NOT_SUPPORTED_ERROR_MESSAGE

See Also:

Constant Field Values

PLUGIN_CONFIG_PROP_SERVER_ROOT

public static final String PLUGIN_CONFIG_PROP_SERVER_ROOT

See Also:

Constant Field Values

PLUGIN_CONFIG_PROP_EXECUTABLE_PATH

public static final String PLUGIN_CONFIG_PROP_EXECUTABLE_PATH

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Constant Field Values

PLUGIN_CONFIG_PROP_CONTROL_SCRIPT_PATH

public static final String PLUGIN_CONFIG_PROP_CONTROL_SCRIPT_PATH

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Constant Field Values

PLUGIN_CONFIG_PROP_URL

public static final String PLUGIN_CONFIG_PROP_URL

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Constant Field Values

PLUGIN_CONFIG_PROP_HTTPD_CONF

public static final String PLUGIN_CONFIG_PROP_HTTPD_CONF

See Also:

Constant Field Values

PLUGIN_CONFIG_PROP_SNMP_AGENT_HOST

public static final String PLUGIN_CONFIG_PROP_SNMP_AGENT_HOST

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Constant Field Values

PLUGIN_CONFIG_PROP_SNMP_AGENT_PORT

public static final String PLUGIN_CONFIG_PROP_SNMP_AGENT_PORT

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Constant Field Values

PLUGIN_CONFIG_PROP_SNMP_AGENT_COMMUNITY

public static final String PLUGIN_CONFIG_PROP_SNMP_AGENT_COMMUNITY

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Constant Field Values

PLUGIN_CONFIG_PROP_ERROR_LOG_FILE_PATH

public static final String PLUGIN_CONFIG_PROP_ERROR_LOG_FILE_PATH

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Constant Field Values

PLUGIN_CONFIG_PROP_ERROR_LOG_EVENTS_ENABLED

public static final String PLUGIN_CONFIG_PROP_ERROR_LOG_EVENTS_ENABLED

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Constant Field Values

PLUGIN_CONFIG_PROP_ERROR_LOG_MINIMUM_SEVERITY

public static final String PLUGIN_CONFIG_PROP_ERROR_LOG_MINIMUM_SEVERITY

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Constant Field Values

PLUGIN_CONFIG_PROP_ERROR_LOG_INCLUDES_PATTERN

public static final String PLUGIN_CONFIG_PROP_ERROR_LOG_INCLUDES_PATTERN

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Constant Field Values

PLUGIN_CONFIG_PROP_VHOST_FILES_MASK

public static final String PLUGIN_CONFIG_PROP_VHOST_FILES_MASK

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Constant Field Values

PLUGIN_CONFIG_PROP_VHOST_CREATION_POLICY

public static final String PLUGIN_CONFIG_PROP_VHOST_CREATION_POLICY

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Constant Field Values

PLUGIN_CONFIG_PROP_RESTART_AFTER_CONFIG_UPDATE

public static final String PLUGIN_CONFIG_PROP_RESTART_AFTER_CONFIG_UPDATE

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Constant Field Values

PLUGIN_CONFIG_VHOST_IN_SINGLE_FILE_PROP_VALUE

public static final String PLUGIN_CONFIG_VHOST_IN_SINGLE_FILE_PROP_VALUE

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Constant Field Values

PLUGIN_CONFIG_VHOST_PER_FILE_PROP_VALUE

public static final String PLUGIN_CONFIG_VHOST_PER_FILE_PROP_VALUE

See Also:

Constant Field Values

PLUGIN_CONFIG_CUSTOM_MODULE_NAMES

public static final String PLUGIN_CONFIG_CUSTOM_MODULE_NAMES

See Also:

Constant Field Values

PLUGIN_CONFIG_MODULE_MAPPING

public static final String PLUGIN_CONFIG_MODULE_MAPPING

See Also:

Constant Field Values

PLUGIN_CONFIG_MODULE_NAME

public static final String PLUGIN_CONFIG_MODULE_NAME

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Constant Field Values

PLUGIN_CONFIG_MODULE_SOURCE_FILE

public static final String PLUGIN_CONFIG_MODULE_SOURCE_FILE

See Also:

Constant Field Values

AUXILIARY_INDEX_PROP

public static final String AUXILIARY_INDEX_PROP

See Also:

Constant Field Values

SERVER_BUILT_TRAIT

public static final String SERVER_BUILT_TRAIT

See Also:

Constant Field Values

AUGEAS_ENABLED

public static final String AUGEAS_ENABLED

See Also:

Constant Field Values

DEFAULT_EXECUTABLE_PATH

public static final String DEFAULT_EXECUTABLE_PATH

DEFAULT_ERROR_LOG_PATH

public static final String DEFAULT_ERROR_LOG_PATH

Constructor Detail

ApacheServerComponent

public ApacheServerComponent()

Method Detail

start

public void start(ResourceContext<PlatformComponent> resourceContext)
           throws Exception

Specified by:

start in interface ResourceComponent<PlatformComponent>

Throws:

Exception

stop

public void stop()

Specified by:

stop in interface ResourceComponent<PlatformComponent>

getAvailability

public AvailabilityType getAvailability()

Specified by:

getAvailability in interface AvailabilityFacet

getValues

public void getValues(MeasurementReport report,
                      Set<MeasurementScheduleRequest> schedules)
               throws Exception

Specified by:

getValues in interface MeasurementFacet

Throws:

Exception

invokeOperation

@Nullable
public OperationResult invokeOperation(@NotNull
                                                String name,
                                                @NotNull
                                                Configuration params)
                                throws Exception

Specified by:

invokeOperation in interface OperationFacet

Throws:

Exception

loadResourceConfiguration

public Configuration loadResourceConfiguration()
                                        throws Exception

Specified by:

loadResourceConfiguration in interface ConfigurationFacet

Throws:

Exception

updateResourceConfiguration

public void updateResourceConfiguration(ConfigurationUpdateReport report)

Specified by:

updateResourceConfiguration in interface ConfigurationFacet

getAugeasProxy

public AugeasProxy getAugeasProxy()
                           throws net.augeas.AugeasException

Specified by:

getAugeasProxy in interface AugeasRHQComponent<PlatformComponent>

Throws:

net.augeas.AugeasException

getAugeasTree

public AugeasTree getAugeasTree()
                         throws net.augeas.AugeasException

Specified by:

getAugeasTree in interface AugeasRHQComponent<PlatformComponent>

Throws:

net.augeas.AugeasException

createResource

public CreateResourceReport createResource(CreateResourceReport report)

Specified by:

createResource in interface CreateChildResourceFacet

getSNMPSession

@NotNull
public SNMPSession getSNMPSession()
                           throws Exception

Returns an SNMP session that can be used to communicate with this server's SNMP agent.

Returns:

an SNMP session that can be used to communicate with this server's SNMP agent

Throws:

Exception - on failure to initialize the SNMP session

getSNMPSession

@NotNull
public static SNMPSession getSNMPSession(SNMPClient snmpClient,
                                                 Configuration pluginConfig)
                                  throws Exception

Throws:

Exception

getServerRoot

@NotNull
public File getServerRoot()

Return the absolute path of this Apache server's server root (e.g. "C:\Program Files\Apache Group\Apache2").

Returns:

the absolute path of this Apache server's server root (e.g. "C:\Program Files\Apache Group\Apache2")

getExecutablePath

@NotNull
public File getExecutablePath()

Return the absolute path of this Apache server's executable (e.g. "C:\Program Files\Apache Group\Apache2\bin\Apache.exe").

Returns:

the absolute path of this Apache server's executable (e.g. "C:\Program Files\Apache Group\Apache2\bin\Apache.exe")

getServerUrl

@Nullable
public String getServerUrl()

Returns:

The url the server is pinged for availability or null if the url is not set.

getHttpdConfFile

public File getHttpdConfFile()

Returns the httpd.conf file

Returns:

A File object that represents the httpd.conf file or null in case of error

getControlScriptPath

@NotNull
public File getControlScriptPath()

Return the absolute path of this Apache server's control script (e.g. "C:\Program Files\Apache Group\Apache2\bin\Apache.exe"). On Unix we need to try various locations, as some unixes have bin/ conf/ .. all within one root and on others those are separated.

Returns:

the absolute path of this Apache server's control script (e.g. "C:\Program Files\Apache Group\Apache2\bin\Apache.exe")

getConfigurationTimestamp

@NotNull
public ConfigurationTimestamp getConfigurationTimestamp()

finishConfigurationUpdate

public void finishConfigurationUpdate(ConfigurationUpdateReport report)

This method is supposed to be called from updateResourceConfiguration(ConfigurationUpdateReport) of this resource and any child resources. Based on the plugin configuration of this resource, the Apache instance is either restarted or left as is.

Parameters:

report - the report is updated with the error message and status is set to failure if the restart fails.

finishChildResourceCreate

public void finishChildResourceCreate(CreateResourceReport report)

This method is akin to finishConfigurationUpdate(ConfigurationUpdateReport) but should be used in the createResource(CreateResourceReport) method.

Parameters:

report - the report is updated with the error message and status is set to failure if the restart fails.

conditionalRestart

public void conditionalRestart()
                        throws Exception

Conditionally restarts the server based on the settings in the plugin configuration of the server.

Throws:

Exception - if the restart fails.

deleteEmptyFile

public void deleteEmptyFile(AugeasTree tree,
                            AugeasNode deletedNode)

This method checks whether the supplied node that has been deleted from the tree didn't leave the file it was contained in empty. If the file is empty after deleting the node, the file is automatically deleted.

Parameters:

tree - TODO

deletedNode - the node that has been deleted from the tree.

getModuleNames

public Map<String,String> getModuleNames()

getCurrentProcessInfo

public ProcessInfo getCurrentProcessInfo()

getCurrentBinaryInfo

public ApacheBinaryInfo getCurrentBinaryInfo()

getAddressUtility

public HttpdAddressUtility getAddressUtility()

loadParser

public ApacheDirectiveTree loadParser()

isAugeasEnabled

public boolean isAugeasEnabled()