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Spring
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Security
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Available
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as
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of
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Camel
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2.3
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The camel-spring-security
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component
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provides
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role-based
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authorization
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for
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Camel
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routes.
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It
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leverages
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the
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authentication
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and
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user
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services
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provided
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by
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...
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(formerly
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Acegi
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Security)
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and
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adds
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a
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declarative,
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role-based
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policy
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system
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to
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control
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whether
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a
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route
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can
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be
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executed
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by
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a
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given
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principal.
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If
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you
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are
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not
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familiar
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with
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the
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Spring
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Security
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authentication
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and
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authorization
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system,
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please
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review
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the
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current
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reference
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documentation
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on
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the
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SpringSource
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web
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site
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linked
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above.
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Creating
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authorization
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policies
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Access
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to
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a
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route
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is
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controlled
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by
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an
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instance
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of
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a
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SpringSecurityAuthorizationPolicy
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object.
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A
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policy
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object
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contains
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the
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name
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of
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the
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Spring
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Security
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authority
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(role)
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required
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to
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run
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a
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set
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of
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endpoints
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and
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references
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to
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Spring
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Security
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AuthenticationManager
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and
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AccessDecisionManager
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objects
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used
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to
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determine
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whether
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the
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current
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principal
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has
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been
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assigned
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that
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role.
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Policy
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objects
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may
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be
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configured
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as
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Spring
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beans
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or
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by
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using
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an
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<authorizationPolicy>
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element
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in
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Spring
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XML.
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The
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<authorizationPolicy>
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element
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may
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contain
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the
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following
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attributes:
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Name | Default Value | Description |
|---|---|---|
|
| The unique Spring bean identifier which is used to reference the policy in routes (required) |
|
| The Spring Security authority name that is passed to the access decision manager (required) |
|
| The name of the Spring Security |
|
| The name of the Spring Security |
| DefaultAuthenticationAdapter | Camel 2.4 The name of a camel-spring-security |
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into |
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a |
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Spring |
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Security |
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|
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instance. |
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|
| If a |
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cannot |
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be |
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found |
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in |
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the |
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In |
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message |
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header |
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under |
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Exchange.AUTHENTICATION, |
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check |
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the |
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Spring |
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Security |
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|
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for |
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an |
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|
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object. |
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|
| If set to true, the |
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each |
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time |
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the |
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policy |
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is |
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accessed. |
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Controlling access to Camel routes
A Spring Security AuthenticationManager and AccessDecisionManager are required to use this component. Here is an example of how to configure these objects in Spring XML using the Spring Security namespace:
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Now
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that
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the
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underlying
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security
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objects
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are
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set
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up,
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we
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can
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use
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them
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to
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configure
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an
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authorization
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policy
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and
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use
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that
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policy
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to
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control
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access
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to
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a
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route:
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In
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this
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example,
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the
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endpoint
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mock:end
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will
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not
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be
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executed
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unless
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a
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Spring
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Security
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Authentication
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object
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that
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has
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been
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or
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can
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be
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authenticated
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and
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contains
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the
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ROLE_ADMIN
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authority
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can
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be
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located
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by
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the
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admin
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SpringSecurityAuthorizationPolicy
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.
Authentication
The process of obtaining security credentials that are used for authorization is not specified by this component. You can write your own processors or components which get authentication information from the exchange depending on your needs. For example, you might create a processor that gets credentials from an HTTP request header originating in the camel-jetty component. No matter how the credentials are collected, they need to be placed in the In message or the SecurityContextHolder so the camel-spring-security component can access them:
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The SpringSecurityAuthorizationPolicy will automatically authenticate the Authentication object if necessary.
There are two issues to be aware of when using the SecurityContextHolder instead of or in addition to the Exchange.AUTHENTICATION header. First, the context holder uses a thread-local variable to hold the Authentication object. Any routes that cross thread boundaries, like seda or jms, will lose the Authentication object. Second, the Spring Security system appears to expect that an Authentication object in the context is already authenticated and has roles (see the Technical Overview section 5.3.1 for more details).
The default behavior of camel-spring-security is to look for a Subject in the Exchange.AUTHENTICATION header. This Subject must contain at least one principal, which must be a subclass of org.springframework.security.core.Authentication
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.
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You
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can
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customize
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the
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mapping
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of
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Subject
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to
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Authentication
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object
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by
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providing
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an
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implementation
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of
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the
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org.apache.camel.component.spring.security.AuthenticationAdapter
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to
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your
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<authorizationPolicy>
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bean.
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This
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can
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be
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useful
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if
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you
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are
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working
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with
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components
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that
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do
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not
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use
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Spring
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Security
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but
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do
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provide
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a
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Subject
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.
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At
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this
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time,
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only
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the
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component
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populates
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the
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Exchange.AUTHENTICATION
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header.
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Handling
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authentication
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and
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authorization
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errors
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If
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authentication
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or
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authorization
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fails
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in
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the
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SpringSecurityAuthorizationPolicy
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,
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a
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CamelAuthorizationException
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will
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be
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thrown.
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This
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can
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be
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handled
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using
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Camel's
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standard
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exception
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handling
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methods,
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like
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the
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...
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.
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The
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CamelAuthorizationException
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will
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have
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a
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reference
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to
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the
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ID
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of
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the
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policy
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which
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threw
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the
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exception
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so
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you
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can
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handle
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errors
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based
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on
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the
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policy
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as
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well
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as
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the
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type
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of
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exception:
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Dependencies
Maven users will need to add the following dependency to their pom.xml for this component:
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This dependency will also pull in org.springframework.security:spring-security-core:3.0.3.RELEASE
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and
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org.springframework.security:spring-security-config:3.0.3.RELEASE
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.
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