Merging Configuration from Multiple Deployment Units

From: Borut Bolčina (borut.bolcin..mail.com)
Date: Fri Feb 12 2010 - 06:57:30 EST

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    Hello,

    I have two projects (jars) - each is only having Cayenne Data Objects for
    two different models/two different databases.

    project-model1:
    ├───java
    │ └───si
    │ └───planet9
    │ └───logotypes
    │ └───model
    │ │ Logo.java
    │ └───auto
    │ _Logo.java
    │
    └───resources
            cayenne.xml
            LogotypesMap.map.xml

    project-model2:
    ├───java
    │ ├───com
    │ │ └───interseek
    │ │ └───startpage
    │ │ └───model
    │ │ │ Fund.java
    │ │ └───auto
    │ │ _Fund.java
    └───resources
            cayenne.xml
            StartpageMap.map.xml

    Some of my web apps need project-model1, some project-model2 and some could
    use both.

    cayenne.xml for project-model1:

    <?xml version="1.0" encoding="utf-8"?>
    <domains project-version="3.0.0.1">
    <domain name="InterseekDomain">
        <map name="LogotypesMap" location="LogotypesMap.map.xml"/>

        <node name="LogotypesNode"
             datasource="dbcp-logotypes.properties"
             factory="org.apache.cayenne.conf.DBCPDataSourceFactory">
                <map-ref name="LogotypesMap"/>
         </node>
    </domain>
    </domains>

    and for project-model2:

    <?xml version="1.0" encoding="utf-8"?>
    <domains project-version="3.0.0.1">
    <domain name="InterseekDomain">
        <map name="StartpageMap" location="StartpageMap.map.xml"/>

        <node name="StartpageNode"
             datasource="dbcp.properties"
             factory="org.apache.cayenne.conf.DBCPDataSourceFactory">
                <map-ref name="StartpageMap"/>
         </node>
    </domain>
    </domains>

    I was hoping the two domains will get merged and so both datamaps will get
    loaded.

    The Logo data object is from LogotypesNode and the Fund data object is from
    StartpageNode. The code

            ObjectContext context = DataContext.createDataContext();

            SelectQuery q = new SelectQuery(Logo.class);
            List<Logo> logos = context.performQuery(q);

            for (Logo logo : logos) {
                logger.info(logo);
            }

            q = new SelectQuery(Fund.class);
            List<Fund> funds = context.performQuery(q);

            for (Fund fund : funds) {
                logger.info(fund);
            }

    prints out:

    DEBUG [12:33:00.020] using domain file name: cayenne.xml
    DEBUG [12:33:00.021] initialize starting.
     INFO [12:33:00.030] started configuration loading.
     INFO [12:33:00.032] loaded domain: InterseekDomain
     INFO [12:33:00.083] loaded <map name='LogotypesMap'
    location='LogotypesMap.map.xml'>.
     INFO [12:33:00.085] loading <node name='LogotypesNode'
    datasource='dbcp-logotypes.properties'
    factory='org.apache.cayenne.conf.DBCPDataSourceFactory'
    schema-update-strategy='org.apache.cayenne.access.dbsync.SkipSchemaUpdateStrategy'>.
     INFO [12:33:00.092] using factory:
    org.apache.cayenne.conf.DBCPDataSourceFactory
    DEBUG [12:33:00.093] DBCP Properties: {cayenne.dbcp.validationQuery="SELECT
    1 FROM AUTO_PK_SUPPORT;", cayenne.dbcp.url=jdbc:mysql://
    dev.interseek.com:3306/logotypes?characterEncoding=utf8&amp;autoReconnect=true,
    cayenne.dbcp.maxActive=50, cayenne.dbcp.maxIdle=8,
    cayenne.dbcp.password=masterkey, cayenne.dbcp.maxWait=10000,
    cayenne.dbcp.minIdle=5, cayenne.dbcp.driverClassName=com.mysql.jdbc.Driver,
    cayenne.dbcp.username=backend}
     INFO [12:33:00.109] loaded datasource.
     INFO [12:33:00.110] no adapter set, using automatic adapter.
     INFO [12:33:00.118] loaded map-ref: LogotypesMap.
    DEBUG [12:33:00.119] added domain: InterseekDomain
     INFO [12:33:00.119] finished configuration loading in 89 ms.
    DEBUG [12:33:00.119] initialize finished.
     INFO [12:33:00.200] --- will run 1 query.
     INFO [12:33:00.376] --- transaction started.
    DEBUG [12:33:00.386] searching for resource under:
    org/apache/cayenne/dba/mysql/types.xml
     INFO [12:33:00.405] Detected and installed adapter:
    org.apache.cayenne.dba.mysql.MySQLAdapter
     INFO [12:33:00.436] SELECT t0.url_firma, t0.url_image, t0.url_hash_image,
    t0.url_tis, t0.url_bizi, t0.url, t0.id FROM logo t0 - prepared in 24 ms.
     INFO [12:33:00.453] === returned 0 rows. - took 42 ms.
     INFO [12:33:00.454] +++ transaction committed.
    ERROR [12:33:00.459] Job reader.gold-logotypes threw an unhandled Exception:

    org.apache.cayenne.CayenneRuntimeException: [v.3.0RC1 Jan 05 2010 14:44:59]
    No DataMap found, can't route query
    org.apache.cayenne.query.SelectQuer..e881b6[root=class
    com.interseek.startpage.model.Fund,name=<null>]
        at org.apache.cayenne.query.AbstractQuery.route(AbstractQuery.java:134)

    I am using Cayenne 3.0RC1.

    What is the easiest way of doing this? I was reading
    http://cwiki.apache.org/CAY/runtime-metadata-merging.html, but am I doing
    something wrong?

    Thanks,
    Borut

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