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Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents 30f157c7e466
children
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<?xml version="1.0" encoding="UTF-8"?>
<ehcache>

    <diskStore path="java.io.tmpdir"/>

    <defaultCache
            maxElementsInMemory="1000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="3600"
            overflowToDisk="true"
            maxElementsOnDisk="100000"
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU"
            />

    <!-- This one is used for the WST value tables -->

    <cache name="wst-value-table"
           maxElementsInMemory="20"
           maxElementsOnDisk="100"
           eternal="false"
           timeToIdleSeconds="360"
           overflowToDisk="true"
           timeToLiveSeconds="14400"
           diskPersistent="true"
           memoryStoreEvictionPolicy="LRU"
           />

    <cache name="location-provider"
           maxElementsInMemory="20"
           eternal="false"
           diskPersistent="true"
           overflowToDisk="true"
           timeToIdleSeconds="360"
           timeToLiveSeconds="86400"
           memoryStoreEvictionPolicy="LFU"
           />

    <!-- This one is used to cache the computed values.-->
    <cache name="computed.values"
           maxElementsInMemory="200"
           eternal="false"
           timeToLiveSeconds="172800"
           overflowToDisk="true"
           diskPersistent="true"
           memoryStoreEvictionPolicy="LRU"
           />

    <!-- This one is used to cache the non-computed wst-values.-->
    <cache name="wst-value-table-static"
           maxElementsInMemory="200"
           eternal="false"
           timeToLiveSeconds="172800"
           overflowToDisk="true"
           diskPersistent="true"
           memoryStoreEvictionPolicy="LRU"
           />

    <!-- This one is used to cache the non-computed wst-values.-->
    <cache name="wst-wq-value-table-static"
           maxElementsInMemory="200"
           eternal="false"
           timeToLiveSeconds="172800"
           overflowToDisk="true"
           diskPersistent="true"
           memoryStoreEvictionPolicy="LRU"
           />

    <!-- This one is used for the SQL statements used by the static datacage -->
    <cache name="datacage.db"
           maxElementsInMemory="2000"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LFU"
           />

    <!-- This one is used for the cross section next neighbor lookup -->
    <cache name="cross-section-kms"
           maxElementsInMemory="50"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LRU"
           />

    <!-- This one is used to load chunks of the cross section lines  -->
    <cache name="fast-cross-section-lines"
           maxElementsInMemory="500"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LRU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used to hold the S/Q overviews. -->
    <cache name="sq-overviews"
           maxElementsInMemory="15"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LFU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used to hold the fixings overviews. -->
    <cache name="fixings-overviews"
           maxElementsInMemory="15"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LFU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used to hold the data columns of fixings. -->
    <cache name="fixings-columns"
           maxElementsInMemory="70"
           eternal="false"
           timeToLiveSeconds="7200"
           memoryStoreEvictionPolicy="LFU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used to load single HYK Zones  -->
    <cache name="hykache"
           maxElementsInMemory="500"
           eternal="false"
           timeToLiveSeconds="14400"
           memoryStoreEvictionPolicy="LRU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used to load gauge finders -->
    <cache name="gauge-finders"
           maxElementsInMemory="15"
           eternal="false"
           timeToLiveSeconds="14400"
           memoryStoreEvictionPolicy="LRU"
           overflowToDisk="true"
           diskPersistent="true"
           />

    <!-- This one is used for the cross section lookup
         Because of lazy fetching and relatively big amount of data, disabled
         cache for now.
    <cache name="cross_sections"
           maxElementsInMemory="50"
           eternal="false"
           timeToLiveSeconds="86400"
           memoryStoreEvictionPolicy="LRU"
           />
    -->
</ehcache>
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