Merge pull request #14 from vertical-blank/add-demo-source

add demo sources

Author: vertical-blank

README.md

@@ -4,12 +4,14 @@
 ![travis](https://api.travis-ci.org/vertical-blank/sql-formatter.svg?branch=master)
 [![codecov](https://codecov.io/gh/vertical-blank/sql-formatter/branch/master/graph/badge.svg)](https://codecov.io/gh/vertical-blank/sql-formatter)
 
-Java port of great SQL formatter https://github.com/zeroturnaround/sql-formatter.
+Java port of great SQL formatter <https://github.com/zeroturnaround/sql-formatter.>
 
 Written with only Java Standard Library, without dependencies.
 
 [Demo](http://www.vertical-blank.com/sql-formatter/)
 
+Demo is running on Google Cloud Function, with native-compiled shared library by GraalVM.
+
 ## Usage
 
 ### Maven
@@ -32,11 +34,12 @@ implementation 'com.github.vertical-blank:sql-formatter:1.0'
 
 You can easily use `com.github.vertical_blank.sqlformatter.SqlFormatter` :
 
-```
+```java
 SqlFormatter.format("SELECT * FROM table1")
 ```
 
 This will output:
+
 ```sql
 SELECT
   *
@@ -71,6 +74,7 @@ SqlFormatter.format("SELECT * FROM table1", "    ");
 ```
 
 This will output:
+
 ```sql
 SELECT
     *

demo/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+*.h
+*.so
+*.jar
+*.class

demo/README.md

@@ -0,0 +1,37 @@
+
+# Demo
+
+## How to build
+
+### Download jar
+
+```bash
+wget http://central.maven.org/maven2/com/github/vertical-blank/sql-formatter/1.0/sql-formatter-1.0.jar
+```
+
+### compile java
+
+```bash
+path/to/graalvm/bin/javac src/main/java/com/github/vertical_blank/sqlformatter/SqlFormatterDemo.java -cp ./sql-formatter-1.0.jar
+```
+
+### generate shared object
+
+```bash
+path/to/graalvm/bin/native-image --shared -H:Name=sqlformatterdemo -cp src/main/java/:sql-formatter-1.0.jar
+```
+
+### setup javascript
+
+Note: Python 2.7 is requied by node-gyp.
+
+```bash
+npm i
+cp sqlformatterdemo.so js/
+```
+
+## deploy to google cloud function
+
+```bash
+gcloud functions deploy format_sql --runtime nodejs8 --entry-point handler --trigger-http
+```

demo/js/.gcloudignore

@@ -0,0 +1,14 @@
+# This file specifies files that are *not* uploaded to Google Cloud Platform
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore

demo/js/index.js

@@ -0,0 +1,54 @@
+const ref = require('ref');
+const ffi = require('ffi');
+
+const libJava = ffi.Library(__dirname + '/sqlformatterdemo', {
+  graal_create_isolate: [
+    ref.types.int, [
+      ref.refType(ref.types.void),
+      ref.refType(ref.types.void),
+      ref.refType(ref.refType(ref.types.void))
+    ]],
+  graal_tear_down_isolate: [
+    ref.types.int, [
+      ref.refType(ref.types.void)]
+  ],
+  hello: [
+    ref.types.CString,
+    [ref.refType(ref.types.void)]],
+  format_sql: [
+    ref.types.CString, [
+      ref.refType(ref.types.void),
+      ref.refType(ref.types.CString)
+    ]],
+})
+
+/**
+ * HTTP Cloud Function.
+ *
+ * @param {Object} req Cloud Function request context.
+ * @param {Object} res Cloud Function response context.
+ */
+exports.handler = (req, res) => {
+  const p_graal_isolatethread_t = ref.alloc(ref.refType(ref.types.void))
+
+  const rc = libJava.graal_create_isolate(ref.NULL, ref.NULL, p_graal_isolatethread_t)
+  if (rc !== 0) {
+    res.header('Access-Control-Allow-Origin', "*");
+    res.header('Access-Control-Allow-Headers', "Origin, X-Requested-With, Content-Type, Accept");
+    res.send('error on isolate creation or attach')
+    return;
+  }
+  if (req.method !== 'POST') {
+    const hello = libJava.hello(ref.deref(p_graal_isolatethread_t))
+    res.header('Access-Control-Allow-Origin', "*");
+    res.header('Access-Control-Allow-Headers', "Origin, X-Requested-With, Content-Type, Accept");
+    res.send(hello);
+  } else {
+    const formatted = libJava.format_sql(ref.deref(p_graal_isolatethread_t), ref.allocCString(req.rawBody.toString()))
+    res.header('Access-Control-Allow-Origin', "*");
+    res.header('Access-Control-Allow-Headers', "Origin, X-Requested-With, Content-Type, Accept");
+    res.send(formatted);
+  }
+
+  libJava.graal_tear_down_isolate(ref.deref(p_graal_isolatethread_t));
+};

demo/js/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "google-cloud-function-node",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ffi": "^2.3.0"
+  }
+}

demo/src/main/java/com/github/vertical_blank/sqlformatter/SqlFormatterDemo.java

@@ -0,0 +1,20 @@
+package com.github.vertical_blank.sqlformatter;
+
+import org.graalvm.nativeimage.IsolateThread;
+import org.graalvm.nativeimage.c.function.CEntryPoint;
+import org.graalvm.nativeimage.c.type.CTypeConversion;
+import org.graalvm.nativeimage.c.type.CCharPointer;
+
+public final class SqlFormatterDemo {
+
+    @CEntryPoint(name = "hello")
+    static CCharPointer hello(IsolateThread thread) {
+        return CTypeConversion.toCString("hello from native lib").get();
+    }
+
+    @CEntryPoint(name = "format_sql")
+    static CCharPointer formatSql(IsolateThread thread, CCharPointer sql) {
+        return CTypeConversion.toCString(SqlFormatter.format(CTypeConversion.toJavaString(sql))).get();
+    }
+
+}