From 67cdcc2e12118becb823e20a40cc2687f2b8425a Mon Sep 17 00:00:00 2001
From: Adam Carpenter <53hornet@gmail.com>
Date: Wed, 27 Mar 2019 15:32:37 -0400
Subject: Started Rust in Action MEAP.

---
 meap/meap-code/ch10/ch10-basic-handler/Cargo.toml  |  9 ++++
 meap/meap-code/ch10/ch10-basic-handler/Dockerfile  | 36 ++++++++++++++
 meap/meap-code/ch10/ch10-basic-handler/Makefile    |  2 +
 meap/meap-code/ch10/ch10-basic-handler/src/main.rs | 58 ++++++++++++++++++++++
 4 files changed, 105 insertions(+)
 create mode 100644 meap/meap-code/ch10/ch10-basic-handler/Cargo.toml
 create mode 100644 meap/meap-code/ch10/ch10-basic-handler/Dockerfile
 create mode 100644 meap/meap-code/ch10/ch10-basic-handler/Makefile
 create mode 100644 meap/meap-code/ch10/ch10-basic-handler/src/main.rs

(limited to 'meap/meap-code/ch10/ch10-basic-handler')

diff --git a/meap/meap-code/ch10/ch10-basic-handler/Cargo.toml b/meap/meap-code/ch10/ch10-basic-handler/Cargo.toml
new file mode 100644
index 0000000..7cc2735
--- /dev/null
+++ b/meap/meap-code/ch10/ch10-basic-handler/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "basic-handler"
+version = "0.1.0"
+authors = ["Tim McNamara <code@timmcnamara.co.nz>"]
+
+[dependencies]
+
+[target.'cfg(not(windows))'.dependencies]
+libc = "0.2"
\ No newline at end of file
diff --git a/meap/meap-code/ch10/ch10-basic-handler/Dockerfile b/meap/meap-code/ch10/ch10-basic-handler/Dockerfile
new file mode 100644
index 0000000..cc17065
--- /dev/null
+++ b/meap/meap-code/ch10/ch10-basic-handler/Dockerfile
@@ -0,0 +1,36 @@
+# strategy sourced from:
+
+# https://www.fpcomplete.com/blog/2018/07/deploying-rust-with-docker-and-kubernetes
+# http://whitfin.io/speeding-up-rust-docker-builds/
+
+# This image will build all dependencies before you
+# introducing the project's source code, which means
+# they'll be cached most of the time.
+
+FROM rust:latest as intermediate
+RUN rustup target add x86_64-unknown-linux-musl
+
+ENV PATH $PATH:/root/.cargo/bin
+ENV PKG_CONFIG_ALLOW_CROSS=1
+
+# fetch dependencies using a minimal project,
+# enabling the docker image to be cached with dependencies installed
+RUN USER=root cargo new --bin project
+WORKDIR /project
+
+COPY ./Cargo.lock ./Cargo.lock
+COPY ./Cargo.toml ./Cargo.toml
+
+#RUN cargo -v build --target x86_64-unknown-linux-musl
+
+# build actual project
+#RUN rm src/*.rs
+COPY ./src ./src
+RUN cargo -v check
+RUN cargo -v build --target x86_64-unknown-linux-musl
+RUN ls -R /project/target
+
+FROM alpine
+COPY --from=intermediate /project/target/x86_64-unknown-linux-musl/debug/basic-handler /
+
+CMD /basic-handler
diff --git a/meap/meap-code/ch10/ch10-basic-handler/Makefile b/meap/meap-code/ch10/ch10-basic-handler/Makefile
new file mode 100644
index 0000000..9d1a25f
--- /dev/null
+++ b/meap/meap-code/ch10/ch10-basic-handler/Makefile
@@ -0,0 +1,2 @@
+container:
+    docker build -t ria-ch10-simple-handler .
\ No newline at end of file
diff --git a/meap/meap-code/ch10/ch10-basic-handler/src/main.rs b/meap/meap-code/ch10/ch10-basic-handler/src/main.rs
new file mode 100644
index 0000000..a7ecb33
--- /dev/null
+++ b/meap/meap-code/ch10/ch10-basic-handler/src/main.rs
@@ -0,0 +1,58 @@
+#![cfg(not(windows))]                                               // <1>
+
+extern crate libc;
+
+use std::mem;
+use std::time;
+use std::thread::{sleep};
+use libc::{SIGTERM, SIGALRM, SIGHUP, SIGQUIT};
+
+static mut SHUT_DOWN: bool = false;
+
+fn register_signal_handler() {
+    let fn_ptr: fn(i32) -> () = handle_signals;                     // <2>
+
+    unsafe {
+        let fn_ptr_as_usize: usize = mem::transmute(fn_ptr);        // <3>
+        libc::signal(SIGTERM, fn_ptr_as_usize);                     // <4>
+    }
+}
+
+#[allow(dead_code)]                                                // <5>
+fn handle_signals(sig: i32) {
+    register_signal_handler();
+
+    unsafe {                                                       // <6>
+        SHUT_DOWN = match sig {                                    // <7>
+            SIGHUP   => false,                                     // <7>
+            SIGALRM  => false,                                     // <7>
+            SIGTERM  => true,                                      // <7>
+            SIGQUIT  => true,                                      // <7>
+            _ => false,                                            // <7>
+        };
+    }
+}
+
+fn main() {
+
+    register_signal_handler();
+    let delay = time::Duration::from_secs(1);
+
+    for i in 1_usize.. {                                                  // <7>
+        unsafe {                                                    // <7>
+            if SHUT_DOWN {
+                println!();  // only print a newline character
+                return;
+            }
+        }
+
+        sleep(delay);
+        print!("{} ", i);
+
+        if i > 10 {
+            unsafe {
+                libc::raise(SIGTERM);
+            }
+        }
+    }
+}
\ No newline at end of file
-- 
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