org.apache.solr.core

Class RunExecutableListener

java.lang.Object

org.apache.solr.core.AbstractSolrEventListener

org.apache.solr.core.RunExecutableListener

All Implemented Interfaces:

SolrEventListener, NamedListInitializedPlugin

class RunExecutableListener
extends AbstractSolrEventListener

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String[]	cmd
protected java.io.File	dir
protected java.lang.String[]	envp
private static int	INVALID_PROCESS_RETURN_CODE Non-zero value for an invalid return code
protected boolean	wait

Fields inherited from class org.apache.solr.core.AbstractSolrEventListener

args, core

Fields inherited from interface org.apache.solr.core.SolrEventListener

log

Constructor Summary

Constructors

Constructor and Description
RunExecutableListener(SolrCore core)

Method Summary

Modifier and Type	Method and Description
protected int	exec(java.lang.String callback) External executable listener.
void	init(NamedList args)
void	newSearcher(SolrIndexSearcher newSearcher, SolrIndexSearcher currentSearcher) The searchers passed here are only guaranteed to be valid for the duration of this method call, so care should be taken not to spawn threads or asynchronous tasks with references to these searchers.
void	postCommit()

Methods inherited from class org.apache.solr.core.AbstractSolrEventListener

addEventParms, toString

Methods inherited from class java.lang.Object

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

Field Detail

cmd

protected java.lang.String[] cmd

dir

protected java.io.File dir

envp

protected java.lang.String[] envp

wait

protected boolean wait

INVALID_PROCESS_RETURN_CODE

private static int INVALID_PROCESS_RETURN_CODE

Non-zero value for an invalid return code

Constructor Detail

RunExecutableListener

public RunExecutableListener(SolrCore core)

Method Detail

init

public void init(NamedList args)

Specified by:

init in interface NamedListInitializedPlugin

Overrides:

init in class AbstractSolrEventListener

exec

protected int exec(java.lang.String callback)

External executable listener.

Parameters:

callback - Unused (As of solr 1.4-dev)

Returns:

Error code indicating if the command has executed successfully.
0 , indicates normal termination.
non-zero , otherwise.

postCommit

public void postCommit()

Specified by:

postCommit in interface SolrEventListener

Overrides:

postCommit in class AbstractSolrEventListener

newSearcher

public void newSearcher(SolrIndexSearcher newSearcher,
                        SolrIndexSearcher currentSearcher)

Description copied from interface: SolrEventListener

The searchers passed here are only guaranteed to be valid for the duration of this method call, so care should be taken not to spawn threads or asynchronous tasks with references to these searchers.

Implementations should add the EventParams.EVENT parameter and set it to a value of either:

• EventParams.FIRST_SEARCHER - First Searcher event
• EventParams.NEW_SEARCHER - New Searcher event

Sample:

    if (currentSearcher != null) {
      nlst.add(CommonParams.EVENT, CommonParams.NEW_SEARCHER);
    } else {
      nlst.add(CommonParams.EVENT, CommonParams.FIRST_SEARCHER);
    }

 

Specified by:

newSearcher in interface SolrEventListener

Overrides:

newSearcher in class AbstractSolrEventListener

Parameters:

newSearcher - The new SolrIndexSearcher to use

currentSearcher - The existing SolrIndexSearcher. null if this is a firstSearcher event.

See Also:

AbstractSolrEventListener.addEventParms(org.apache.solr.search.SolrIndexSearcher, org.apache.solr.common.util.NamedList)