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Content Application Developer Manual / Version 2010

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4.3.2.6 External Link Placeholder

It is possible to use placeholder tokens in External Link content and external links within a Rich Text editor in Studio. For example: an external link that contains a hostname for an external shop which is linked from the corporate site can be written as follows: 

http://{aurora.host}/webapp/wcs/stores/servlet/en/auroraesite

The tokens are enclosed with curly braces. The TokenReplacingLinkTransformer class acts as a LinkTransformer class to replace these tokens in URLs. A list of token resolvers can be registered and each resolver is called per token. The first token Resolver that returns a replacement (value != null) wins. After that no other token resolver will be asked anymore for the current token. The following token resolvers are preconfigured in the given order:

  • SettingsTokenResolver

    This token resolver is used to resolve tokens with values coming from setting documents.

    For example: the following URL 

    http://localhost?connectionId={livecontext.connectionId}

    will be transformed to the URL 

    http://localhost?connectionId=wcs1

    The SettingsTokenResolver resolves the token of the URL to the value "wcs1" because the property livecontext.connectionId is defined as wcs1 in a Setting document, which is accessible via the settings service starting from the current External Link content.

  • SpringPropertyTokenResolver

    This token resolver is used to resolve tokens with values coming from Spring properties.

    The placeholder and their values can be defined by using the prefix "urlToken." in a properties file as follows: 

    urlToken.aurora.host=${livecontext.apache.wcs.host}
urlToken.aurorab2b.host=${livecontext.apache.wcs.host}

    Within the URL attribute of an External Link content the token will be defined without the "urlToken." prefix. It will be replaced with the defined value.

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