Discuss challenges and obstacles to implementation of microserfices architecture in the enterprise.

The major challenges of microservices architecture with solutions are : - 
1. Data Synchronization (Consistency) — Event sourcing architecture can address this issue using the async messaging platform. The SAGA design pattern can address this challenge.

2. Security — An API Gateway can solve these challenges. There are many open source and enterprise APIs are available like Spring Cloud Gateway, Apigee, WSO2, Kong, Okta (2-step authentication) and public cloud offering from AWS, GCP and Azure etc. Custom solutions can also be developed for API security using JWT token, Spring Security, and Netflix OSS Zuul2.

3.  Services Communication — There are the different way to communicate microservices –
a. Point to point using API Gateway
b. Messaging event driven platform using Kafka and RabbitMQ
c. Service Mesh

4. Service Discovery — This will be addressed by open source Istio Service Mesh, API Gateway, Netflix Eureka APIs. It can also be done using Netflix Eureka at the code level. However, doing it in with the orchestration layer will be better and can be managed by these tools rather doing and maintaining it through code and configuration.

5. Data Staleness — The database should be always updated to give recent data. The API will fetch data from the recent and updated database. A timestamp entry can also be added with each record in the database to check and verify the recent data. Caching can be used and customized with an acceptable eviction policy based on business requirements.