main.wisp.lease.Extensions.kt Maven / Gradle / Ivy

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a module containing lease related code

There is a newer version: 2024.11.14.031606-bddeae6

package wisp.lease

/** Converts a [lease] into an [AutoCloseable] resource. */
class AutoCloseableLease(private val lease: Lease) : Lease by lease, AutoCloseable {
    override fun close() {
        lease.release()
    }
}

/**
 * Attempts to acquire an [AutoCloseableLease].
 *
 * Use like
 *
 * ```
 * leaseManager.acquireOrNull("some-lease")?.use { lease ->
 *   // Do something with the lease.
 * }
 * ```
 */
fun LeaseManager.acquireOrNull(name: String): AutoCloseableLease? {
    val lease = requestLease(name)
    return if (lease.acquire()) AutoCloseableLease(lease) else null
}