THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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This
...
design
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is
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intended
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to
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address
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the
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following
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issues:
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...
:
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Simple
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way
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to
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introduce
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new
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servlet
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filters
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into
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the
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chains
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...
:
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Support
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multiple
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<pattern>
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children
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in
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<resource>
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for
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gateway.xml
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...
:
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Simplify
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service
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deployment
...
contributor
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implementation
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Each
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of
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these
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issues
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stem
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from
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what
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is
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currently
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expected
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of
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a
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ServiceDeploymentContributor
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in
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its
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contributeService
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method.
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Basically
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each
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service
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deployment
...
contributor
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is
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expected
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to
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build
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its
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own
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filter
...
chain.
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This
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is
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currently
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done
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by
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making
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calls
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to
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Deploymentcontext.contributeFilter
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.
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While
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this
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provides
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a
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great
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deal
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of
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flexibility
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for
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each
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service
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to
...
define
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a
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custom
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chain
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we
...
have
...
found
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that
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this
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isn't
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commonly
...
necessary.
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Furthermore
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it
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makes
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if
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very
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difficult
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if
...
not
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impossible
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to
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introduce
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new
...
filters
...
in
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a
...
chain
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without
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impacting
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all
...
services.
...
This
...
design
...
will
...
provide
...
an
...
abstraction
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to
...
the
...
service
...
deployment
...
contributors
...
that
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can
...
create
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either
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a
...
default
...
or
...
specifically
...
configured
...
chain
...
of
...
filters.
...
The
...
goal
...
is
...
to
...
support
...
a
...
pattern
...
in
...
service
...
deployment
...
contributors
...
that
...
looks
...
like
...
this:
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} public void contributeService( DeploymentContext context, Service service ) throws Exception { String chain = null; // Default if null, otherwise specific chain name defined in topoloy.xml Map<String,Map<String,String>> params = null; // Default if null, otherwise map of per provider role map of name/value pairs. ResourceDescriptor resource = context.addResource() resource.role( "WEBHDFS" ); resource.pattern( "webhdfs/v1/?**" ); resource.pattern( "webhdfs/v1/**?**" ); context.contributeChain( service, resource, chain, params ); } {newcode} {newcode:xml |
| Code Block | ||||
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} <topology> <gateway> <provider/> <chain name=""> <provider role="" name=""> <param name="" value=""/> </provider> <chain> <provider/> </chain> </gateway> </topology> |
| PlantUML | ||
|---|---|---|
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{xml} {plantuml:title=Classes} scale 1280 width class DeploymentContext { GatewayConfig getGatewayConfig(); Topology getTopology(); WebArchive getWebArchive(); WebAppDescriptor getWebAppDescriptor(); GatewayDescriptor getGatewayDescriptor(); <b>void contributeChain( Service service, ResourceDescriptor resource, String chainName, Map<String,Map<String,String>> providerParams )Service service, void contributeFilter( Service service, ResourceDescriptor resource, String role, String namechainName, List<FilterParamDescriptor> paramsMap<String,Map<String,String>> providerParams ); void addDescriptor( String name, Object descriptor ); <T> T getDescriptor( String name ); } class ServiceDeploymentContributor { String getRole(); String getName(); void initializeContribution( DeploymentContext context ); void contributeService( DeploymentContext context, Service service ) throws Exception; void finalizeContribution( DeploymentContext context ); } class ProviderDeploymentContributor { String getRole(); String getName(); void initializeContribution( DeploymentContext context ); void contributeProvider( DeploymentContext context, Provider provider ); void contributeFilter( DeploymentContext context, Provider provider, Service service, ResourceDescriptor resource, List<FilterParamDescriptor> params ); void finalizeContribution( DeploymentContext context ); } |
| PlantUML | ||
|---|---|---|
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{plantuml} \\ {plantuml:title= Sample Sequences} Filter -> Chain: Text {plantuml} |