DefaultCamelContext starts route services out of order
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Key: CAMEL-2398
URL: https://issues.apache.org/activemq/browse/CAMEL-2398
Project: Apache Camel
Issue Type: Improvement
Components: camel-core
Affects Versions: 2.1.0
Environment: Linux ubuntu 2.6.24-26-generic, java 1.5.0_16
Reporter: Kostyantyn Oliynyk
org.apache.camel.impl.DefaultCamelContext uses HashMap to hold route services
In start() method it uses routeServices.values() to list route services.
It does not works for Esper.
Camel-extra exampe for Ester creates 3 routes:
1: Route[[From[activemq:EventStreamQueue]] -> [To[esper://feed]]]
2: Route[[From[esper://feed?eql=insert into TicksPerSecond select feed,
count(*) as cnt from com.iona.ps.demos.MarketDataEvent.win:time_batch(1 sec)
group by feed]] -> [To[esper://feed]]]
3: Route[[From[esper://feed?eql=select feed, avg(cnt) from
TicksPerSecond.win:time(10 sec) group by feed + having cnt < avg(cnt) * 0.75]]
-> [To[esper://feed], process[com.iona.ps.demos.myroutebuilde...@1274069]]]
3-rd route depends on 2-nd route, it uses TicksPerSecond event type that gets
created in route 2.
DefaultCamelContext starts 3-rd route before 2-nd route, as a result Esper
fails to resolve event type:
com.espertech.esper.epl.expression.ExprValidationException: Failed to resolve
event type: Event type or class named 'TicksPerSecond' was not found
at
com.espertech.esper.epl.spec.FilterStreamSpecRaw.resolveType(FilterStreamSpecRaw.java:189)
at
com.espertech.esper.epl.spec.FilterStreamSpecRaw.compile(FilterStreamSpecRaw.java:99)
at
com.espertech.esper.core.StatementLifecycleSvcImpl.compile(StatementLifecycleSvcImpl.java:956)
at
com.espertech.esper.core.StatementLifecycleSvcImpl.createStopped(StatementLifecycleSvcImpl.java:195)
...
As a workaround, it is possible to change startup order by assigning custom ids
to routes, so routeServices HashMap returns values in different order.
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