serverless: Add initial implementation of OpenDC Serverless (#100)

This change adds the initial implementation of OpenDC Serverless to the
main repository, which is based on Soufiane Jounaid's work. This commit
introduces the main interfaces into the repository. Later commits will
introduce the other features that Soufiane has implemented previously in
OpenDC.

1 files changed, 88 insertions, 0 deletions

diff --git a/simulator/opendc-serverless/opendc-serverless-simulator/src/test/kotlin/org/opendc/serverless/simulator/SimServerlessServiceTest.kt b/simulator/opendc-serverless/opendc-serverless-simulator/src/test/kotlin/org/opendc/serverless/simulator/SimServerlessServiceTest.kt
new file mode 100644
index 00000000..a80365de
--- /dev/null
+++ b/simulator/opendc-serverless/opendc-serverless-simulator/src/test/kotlin/org/opendc/serverless/simulator/SimServerlessServiceTest.kt
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2021 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.opendc.serverless.simulator
+
+import io.mockk.spyk
+import io.mockk.verify
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.runBlockingTest
+import kotlinx.coroutines.yield
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertAll
+import org.opendc.serverless.service.ServerlessService
+import org.opendc.serverless.service.router.RandomRoutingPolicy
+import org.opendc.serverless.simulator.workload.SimServerlessWorkload
+import org.opendc.simulator.compute.SimMachineModel
+import org.opendc.simulator.compute.model.SimMemoryUnit
+import org.opendc.simulator.compute.model.SimProcessingNode
+import org.opendc.simulator.compute.model.SimProcessingUnit
+import org.opendc.simulator.compute.workload.SimFlopsWorkload
+import org.opendc.simulator.compute.workload.SimWorkload
+import org.opendc.simulator.utils.DelayControllerClockAdapter
+
+/**
+ * A test suite for the [ServerlessService] implementation under simulated conditions.
+ */
+@OptIn(ExperimentalCoroutinesApi::class)
+internal class SimServerlessServiceTest {
+
+    private lateinit var machineModel: SimMachineModel
+
+    @BeforeEach
+    fun setUp() {
+        val cpuNode = SimProcessingNode("Intel", "Xeon", "amd64", 2)
+
+        machineModel = SimMachineModel(
+            cpus = List(cpuNode.coreCount) { SimProcessingUnit(cpuNode, it, 1000.0) },
+            memory = List(4) { SimMemoryUnit("Crucial", "MTA18ASF4G72AZ-3G2B1", 3200.0, 32_000) }
+        )
+    }
+
+    @Test
+    fun testSmoke() = runBlockingTest {
+        val clock = DelayControllerClockAdapter(this)
+        val workload = spyk(object : SimServerlessWorkload {
+            override fun onInvoke(): SimWorkload = SimFlopsWorkload(1000)
+        })
+        val deployer = SimFunctionDeployer(clock, this, machineModel) { workload }
+        val service = ServerlessService(coroutineContext, clock, deployer, RandomRoutingPolicy())
+
+        val client = service.newClient()
+
+        val function = client.newFunction("test")
+        function.invoke()
+        delay(2000)
+
+        service.close()
+
+        yield()
+
+        assertAll(
+            { verify { workload.onStart() } },
+            { verify { workload.onInvoke() } },
+            { verify { workload.onStop() } }
+        )
+    }
+}