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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def layer_to_solr(self, layer):
 """ Sync a layer in Solr. """

        success = True
        message = 'Synced layer id %s to Solr' % layer.id

        layer_dict, message = layer2dict(layer)
        if not layer_dict:
            success = False
        else:
            layer_json = json.dumps(layer_dict)
            try:
                url_solr_update = '%s/solr/hypermap/update/json/docs' % SEARCH_URL
                headers = {"content-type": "application/json"}
                params = {"commitWithin": 1500}
                res = requests.post(url_solr_update, data=layer_json, params=params,  headers=headers)
                res = res.json()
                if 'error' in res:
                    success = False
                    message = "Error syncing layer id %s to Solr: %s" % (layer.id, res["error"].get("msg"))
            except Exception, e:
                success = False
                message = "Error syncing layer id %s to Solr: %s" % (layer.id, sys.exc_info()[1])
                LOGGER.error(e, exc_info=True)
        if success:
            LOGGER.info(message)
        else:
            LOGGER.error(message)
        return success, message