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The dynamic map engine is also useful for developers and administrators that need to test multiple map engines and don't want to have to change map engine id's in client configuration when they want to switch map engines, since . By referring to a dynamic map engine can be configured with one back end map engine client and will simply act as a front for that engine, allowing the administrator to change the back end map engine id in the dynamic map engine configuration and have everything that points to the dynamic map engine now work with the new back end map enginein the client map view configuration that real map engine is specified in the dyanmic map engine configuration and can be changed without having to alter the client configuration.
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<?xml version="1.0" encoding="UTF-8"?>
<config xmlns="urn:com.cohga.server.config#1.0"
xmlns:wms="urn:com.cohga.server.map.wms#1.0"
xmlns:dynamic="urn:com.cohga.server.map.dynamic#1.0">
<wms:mapengine id="wms1">
<url>http://server1.local/wms</url>
<!-- other WMS configuration items -->
</wms:mapengine>
<wms:mapengine id="wms2">
<url>http://server2.local/wms</url>
<!-- other WMS configuration items -->
</wms:mapengine>
<!-- will redirect all requests 'redirect' to 'wms1' -->
<dynamic:mapengine id="redirect">
<mapengine>wms1</mapengine>
</dynamic:mapengine>
<!-- will cycle requests for 'loadbalanced' between 'wms1' and 'wms2' -->
<!-- you can list as many map engines as you need but they must all be configured identically -->
<dynamic:mapengine id="loadbalanced">
<mapengine>wms1</mapengine>
<mapengine>wms2</mapengine>
</dynamic:mapengine>
<!-- will send requests for 'failover' to 'wms1' until that falls over, in which case it'll use 'wms2' -->
<!-- you can list as many map engines as you need but they must all be configured identically -->
<dynamic:mapengine id="failover">
<failover>true</failover>
<mapengine>wms1</mapengine>
<mapengine>wms2</mapengine>
</dynamic:mapengine>
<!-- will send requests for 'alternate' to 'wms1' unless the user turns on an aerial photo layer, in which case it will use 'wms2' -->
<!-- you can only list two map engines -->
<!-- Only available since 2.5.16 -->
<dynamic:mapengine id="alternate">
<altlayers>aerial_photo_2001,aerial_photo_2008,aerial_photo_2015</altlayers>
<mapengine>wms1</mapengine>
<mapengine>wms2</mapengine>
</dynamic:mapengine>
</config>
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