web: backend: Implement view endpoint

web/backend/src/jobs.jl

@@ -38,33 +38,11 @@ function run!(processor::JobProcessor)
         job_id = take!(processor.pending)
         put!(processor.processing, job_id)
 
-        # Prepare directories
-        job_dir = joinpath(basedir, "jobs", job_id)
-        log_path = joinpath(job_dir, "output.log")
-        mkpath(job_dir)
-
         # Run work function
-        try
+        processor.work_fn(job_id)
-            @info "Processing job: $job_id"
-            open(log_path, "w") do io
-                redirect_stdout(io) do
-                    redirect_stderr(io) do
-                        processor.work_fn(job_id)
-                        @info "Job $job_id done"
-                    end
-                end
-            end
 
-            # Remove job from processing queue
+        # Remove job from processing queue
-            take!(processor.processing)
+        take!(processor.processing)
-        catch e
-            @error "Failed job: $job_id" e
-            open(log_path, "a") do io
-                println(io, "\nError: ", e)
-                println(io, "\nStacktrace:")
-                return Base.show_backtrace(io, catch_backtrace())
-            end
-        end
     end
 end
 

web/backend/src/server.jl

@@ -44,7 +44,34 @@ function submit(req, processor::JobProcessor)
 end
 
 function jobs_view(req)
-    return HTTP.Response(200, "OK")
+    # Extract job_id from URL path /jobs/{job_id}/view
+    path_parts = split(req.target, '/')
+    job_id = path_parts[3]  # /jobs/{job_id}/view -> index 3
+
+    # Construct job directory path
+    job_dir = joinpath(basedir, "jobs", job_id)
+
+    # Check if job directory exists
+    if !isdir(job_dir)
+        return HTTP.Response(404, "Job not found")
+    end
+
+    # Read log file if it exists
+    log_path = joinpath(job_dir, "output.log")
+    log_content = isfile(log_path) ? read(log_path, String) : nothing
+
+    # Read output.json if it exists
+    output_path = joinpath(job_dir, "output.json")
+    output_content = isfile(output_path) ? read(output_path, String) : nothing
+
+    # Create response JSON
+    response_data = Dict(
+        "log" => log_content,
+        "solution" => output_content
+    )
+
+    response_body = JSON.json(response_data)
+    return HTTP.Response(200, response_body)
 end
 
 function start_server(port::Int = 8080; optimizer)
@@ -52,18 +79,34 @@ function start_server(port::Int = 8080; optimizer)
 
     function work_fn(job_id)
         job_dir = joinpath(basedir, "jobs", job_id)
-        json_path = joinpath(job_dir, "input.json.gz")
+        mkpath(job_dir)
-        instance = UnitCommitment.read(json_path)
+        input_filename = joinpath(job_dir, "input.json.gz")
-        model = UnitCommitment.build_model(;
+        log_filename = joinpath(job_dir, "output.log")
-            instance,
+        solution_filename = joinpath(job_dir, "output.json")
-            optimizer = optimizer,
+        try
-        )
+            open(log_filename, "w") do io
-        UnitCommitment.optimize!(model)
+                redirect_stdout(io) do
-        solution = UnitCommitment.solution(model)
+                    redirect_stderr(io) do
-        return UnitCommitment.write(
+                        instance = UnitCommitment.read(input_filename)
-            joinpath(job_dir, "output.json"),
+                        model = UnitCommitment.build_model(;
-            solution,
+                            instance,
-        )
+                            optimizer = optimizer,
+                        )
+                        UnitCommitment.optimize!(model)
+                        solution = UnitCommitment.solution(model)
+                        UnitCommitment.write(solution_filename, solution)
+                    end
+                end
+            end
+        catch e
+            @error "Failed job: $job_id" e
+            open(log_filename, "a") do io
+                println(io, "\nError: ", e)
+                println(io, "\nStacktrace:")
+                return Base.show_backtrace(io, catch_backtrace())
+            end
+        end
+        return
     end
 
     # Create and start job processor

web/backend/test/src/jobs_test.jl

@@ -10,7 +10,6 @@ function jobs_test_usage()
         # Define dummy work function
         received_job_id = []
         function work_fn(job_id)
-            @show received_job_id
             push!(received_job_id, job_id)
         end
 

web/backend/test/src/server_test.jl

@@ -6,39 +6,55 @@ const PORT = 32617
 
 function server_test_usage()
     server = Backend.start_server(PORT; optimizer = HiGHS.Optimizer)
+    try
+        # Read the compressed fixture file
+        compressed_data = read(fixture("case14.json.gz"))
 
-    # Read the compressed fixture file
+        # Submit test case
-    compressed_data = read(fixture("case14.json.gz"))
+        response = HTTP.post(
+            "http://localhost:$PORT/submit",
+            ["Content-Type" => "application/gzip"],
+            compressed_data,
+        )
+        @test response.status == 200
 
-    # Submit test case
+        # Check response
-    response = HTTP.post(
+        response_data = JSON.parse(String(response.body))
-        "http://localhost:$PORT/submit",
+        @test haskey(response_data, "job_id")
-        ["Content-Type" => "application/gzip"],
+        job_id = response_data["job_id"]
-        compressed_data,
+        @test length(job_id) == 16
-    )
-    @test response.status == 200
 
-    # Check response
+        # Wait for jobs to finish
-    response_data = JSON.parse(String(response.body))
+        sleep(0.1)
-    @test haskey(response_data, "job_id")
+        while isbusy(server.processor)
-    job_id = response_data["job_id"]
+            sleep(0.1)
-    @test length(job_id) == 16
+        end
 
-    # Wait for jobs to finish and stop server
+        # Verify the compressed file was saved correctly
-    sleep(0.1)
+        job_dir = joinpath(Backend.basedir, "jobs", job_id)
-    stop(server)
+        saved_input_path = joinpath(job_dir, "input.json.gz")
+        saved_log_path = joinpath(job_dir, "output.log")
+        saved_output_path = joinpath(job_dir, "output.json")
+        @test isfile(saved_input_path)
+        @test isfile(saved_log_path)
+        @test isfile(saved_output_path)
+        saved_data = read(saved_input_path)
+        @test saved_data == compressed_data
 
-    # Verify the compressed file was saved correctly
+        # Query job information
-    job_dir = joinpath(Backend.basedir, "jobs", job_id)
+        view_response = HTTP.get("http://localhost:$PORT/jobs/$job_id/view")
-    saved_input_path = joinpath(job_dir, "input.json.gz")
+        @test view_response.status == 200
-    saved_log_path = joinpath(job_dir, "output.log")
-    saved_output_path = joinpath(job_dir, "output.json")
-    @test isfile(saved_input_path)
-    @test isfile(saved_log_path)
-    @test isfile(saved_output_path)
-    saved_data = read(saved_input_path)
-    @test saved_data == compressed_data
 
-    # Clean up: remove the job directory
+        # Check response
-    rm(job_dir, recursive=true)
+        view_data = JSON.parse(String(view_response.body))
+        @test haskey(view_data, "log")
+        @test haskey(view_data, "solution")
+        @test view_data["log"] !== nothing
+        @test view_data["solution"] !== nothing
+
+        # Clean up
+        rm(job_dir, recursive=true)
+    finally
+        stop(server)
+    end
 end