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From "Bob Paulin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TIKA-1762) Create Executor Service from TikaConfig
Date Tue, 03 Nov 2015 14:03:27 GMT

    [ https://issues.apache.org/jira/browse/TIKA-1762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987315#comment-14987315

Bob Paulin commented on TIKA-1762:

So I did some more testing with different ExecutorService implementations and the good news
is it appears they do not start creating threads until tasks are submitted to them.  So instantiating
a pool default in the default constructor of a parser should be no worse than what we're currently
doing as long as we have a reasonable thread keep alive time to wind down unused threads.
 So I'm thinking of modifying the default thread pool to include a keep alive and create it
within the constructor of a parser through the static TikaConfig.getDefaultConfig().  SO:

public NetworkParser(URI uri, Set<MediaType> supportedTypes) {
        this(uri, supportedTypes, TikaConfig.getDefaultConfig().getDefaultExecutorService());
    public NetworkParser(URI uri, Set<MediaType> supportedTypes, ExecutorService executorService)
        this.uri = uri;
        this.supportedTypes = supportedTypes;
        this.executorService = executorService;


> Create Executor Service from TikaConfig
> ---------------------------------------
>                 Key: TIKA-1762
>                 URL: https://issues.apache.org/jira/browse/TIKA-1762
>             Project: Tika
>          Issue Type: Improvement
>            Reporter: Bob Paulin
>             Fix For: 1.11
> Create a configurable executor service that is configurable from the TikaConfig.
>  Konstantin Gribov added a comment - 23/Sep/15 09:55
> Bob Paulin, I have two ideas on the issue:
>     by default use common thread pool, configured via and contained in TikaConfig as
Tyler Palsulich suggested,
>     you can pass thread pool for parser invocation via ParserContext with fallback to
default if now thread pool/executor service in context.
> Also o.a.tika.Tika#parse(InputStream, Metadate) produces o.a.tika.parser.ParsingReader
and anonymous Executor with unbounded daemon thread creation.

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