We Know I Know You Know; Choreographic Programming With Multicast and Multiply Located Values
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913261860945920 |
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| author | Bates, Mako Near, Joseph P. |
| author_facet | Bates, Mako Near, Joseph P. |
| contents | Concurrent distributed systems are notoriously difficult to construct and reason about. Choreographic programming is a recent paradigm that describes a distributed system in a single global program called a choreography. Choreographies simplify reasoning about distributed systems and can ensure deadlock freedom by static analysis. In previous choreographic programming languages, each value is located at a single party, and the programmer is expected to insert special untyped "select" operations to ensure that all parties follow the same communication pattern.
We present He-Lambda-Small, a new choreographic programming language with Multiply Located Values. He-Lambda-Small allows multicasting to a set of parties, and the resulting value will be located at all of them. This approach enables a simple and elegant alternative to "select": He-Lambda-Small requires that the guard for a conditional be located at all of the relevant parties. In He-Lambda-Small, checking that a choreography is well-typed suffices to show that it is deadlock-free. We present several case studies that demonstrate the use of multiply-located values to concisely encode tricky communication patterns described in previous work without the use of "select" or redundant communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_05417 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | We Know I Know You Know; Choreographic Programming With Multicast and Multiply Located Values Bates, Mako Near, Joseph P. Programming Languages Distributed, Parallel, and Cluster Computing Concurrent distributed systems are notoriously difficult to construct and reason about. Choreographic programming is a recent paradigm that describes a distributed system in a single global program called a choreography. Choreographies simplify reasoning about distributed systems and can ensure deadlock freedom by static analysis. In previous choreographic programming languages, each value is located at a single party, and the programmer is expected to insert special untyped "select" operations to ensure that all parties follow the same communication pattern. We present He-Lambda-Small, a new choreographic programming language with Multiply Located Values. He-Lambda-Small allows multicasting to a set of parties, and the resulting value will be located at all of them. This approach enables a simple and elegant alternative to "select": He-Lambda-Small requires that the guard for a conditional be located at all of the relevant parties. In He-Lambda-Small, checking that a choreography is well-typed suffices to show that it is deadlock-free. We present several case studies that demonstrate the use of multiply-located values to concisely encode tricky communication patterns described in previous work without the use of "select" or redundant communication. |
| title | We Know I Know You Know; Choreographic Programming With Multicast and Multiply Located Values |
| topic | Programming Languages Distributed, Parallel, and Cluster Computing |
| url | https://arxiv.org/abs/2403.05417 |