Sqlite factored, command line parse, postgres add

Factored out the sqlite functionality into functions below main,
implemented command line parsing, and stubbed in postgres as a 2nd
database.  Postgres implementation is not started yet, just stub
entrypoint for it to be fleshed out later.

Cargo.lock

@@ -1,20 +1,76 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "autocfg"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "backtrace"
+version = "0.3.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cc"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "clap"
+version = "2.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -23,6 +79,26 @@ dependencies = [
  "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "failure"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "failure_derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "fallible-iterator"
 version = "0.2.0"
@@ -153,6 +229,22 @@ name = "pkg-config"
 version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "r2d2"
 version = "0.8.5"
@@ -299,15 +391,23 @@ dependencies = [
 name = "rust-db-play"
 version = "0.1.0"
 dependencies = [
+ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "r2d2 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "r2d2_sqlite 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rusqlite 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_rusqlite 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "simple-error 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -371,11 +471,50 @@ dependencies = [
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "simple-error"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "smallvec"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "syn"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "time"
 version = "0.1.42"
@@ -386,11 +525,26 @@ dependencies = [
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "unicode-width"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "vec_map"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.3.8"
@@ -411,10 +565,18 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
+"checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+"checksum atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)" = "1803c647a3ec87095e7ae7acfca019e98de5ec9a7d01343f611cf3152ed71a90"
 "checksum autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"
+"checksum backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)" = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
+"checksum backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
 "checksum bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8a606a02debe2813760609f57a64a2ffd27d9fdf5b2f133eaca0b248dd92cdd2"
+"checksum cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)" = "aa87058dce70a3ff5621797f1506cb837edd02ac4c0ae642b4542dce802908b8"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+"checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
+"checksum failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f8273f13c977665c5db7eb2b99ae520952fe5ac831ae4cd09d80c4c7042b5ed9"
+"checksum failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0bc225b78e0391e4b8683440bf2e63c2deeeb2ce5189eab46e2b68c6d3725d08"
 "checksum fallible-iterator 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
 "checksum fallible-streaming-iterator 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
 "checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
@@ -432,6 +594,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum parking_lot_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cb88cb1cb3790baa6776844f968fea3be44956cf184fa1be5a03341f5491278c"
 "checksum parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
 "checksum pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)" = "72d5370d90f49f70bd033c3d75e87fc529fbfff9d6f7cccef07d6170079d91ea"
+"checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
 "checksum r2d2 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bc42ce75d9f4447fb2a04bbe1ed5d18dd949104572850ec19b164e274919f81b"
 "checksum r2d2_sqlite 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "806e268035ce9e5a604bf617ac8a073ef28b59ef2e48e8338db0baf530caef33"
 "checksum rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
@@ -447,6 +611,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
 "checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 "checksum rusqlite 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2a194373ef527035645a1bc21b10dc2125f73497e6e155771233eb187aedd051"
+"checksum rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum ryu 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "19d2271fa48eaf61e53cc88b4ad9adcbafa2d512c531e7fadb6dc11a4d3656c5"
 "checksum scheduled-thread-pool 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bd07742e081ff6c077f5f6b283f12f32b9e7cc765b316160d66289b74546fbb3"
@@ -456,9 +621,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "9796c9b7ba2ffe7a9ce53c2287dfc48080f4b2b362fcc245a259b3a7201119dd"
 "checksum serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)" = "2f72eb2a68a7dc3f9a691bfda9305a1c017a6215e5a4545c258500d2099a37c2"
 "checksum serde_rusqlite 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d3a5f6f43f7669222e8112924cbe2fa8064d552befaf896126ead01e29635078"
+"checksum simple-error 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "339844c9af2d844b9230bb28e8f819a7790cbf20a29b5cbd2b59916a03a1ef51"
 "checksum smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
+"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+"checksum syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "661641ea2aa15845cddeb97dad000d22070bb5c1fb456b96c1cba883ec691e92"
+"checksum synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
+"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
+"checksum unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7007dbd421b92cc6e28410fe7362e2e0a2503394908f417b68ec8d1c364c4e20"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum vcpkg 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "33dd455d0f96e90a75803cfeb7f948768c08d70a6de9a8d2362461935698bf95"
+"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -14,3 +14,6 @@ time = "0.1.42"
 serde = "1.0.101"
 serde_json = "1.0"
 serde_rusqlite = "0.22.0"
+clap = "2.33.0"
+failure = "0.1.6"
+simple-error = "0.2.1"

src/main.rs

@@ -1,40 +1,97 @@
+extern crate clap;
 extern crate r2d2;
 extern crate r2d2_sqlite;
 extern crate rusqlite;
+extern crate simple_error;
 
+use clap::{App, SubCommand};
 use r2d2_sqlite::SqliteConnectionManager;
 use rusqlite::params;
 use serde_json::{Map, Value};
-use serde_rusqlite::*;
+use serde_rusqlite::{from_row};
+use serde_rusqlite::Result as SRResult;
+use r2d2::{PooledConnection};
+use simple_error::*;
 
-fn main() -> Result<()> {
-    let manager = SqliteConnectionManager::memory(); //file(":memory:");
-    let pool = r2d2::Pool::new(manager).unwrap();
-    let conn = pool.get().unwrap();
+fn main() -> Result<(), SimpleError> {
+	let matches = App::new("Rust DB Play")
+		.version("1.0")
+		.author("Jonathan Altman <jonathan@async.io>")
+		.about("Test out Rust database result serialization")
+		.subcommand(SubCommand::with_name("sqlite")
+			.about("Test on sqlite"))
+		.subcommand(SubCommand::with_name("postgres")
+			.about("Test on postgres"))
+		.get_matches();
 
-    conn.execute(
-        "CREATE TABLE person (
+	return match matches.subcommand_name() {
+		Some("sqlite") => test_sqlite(),
+		Some("postgres") => test_postgres(),
+		None => bail!("No database specified"),
+		_ => bail!("Unknown database specified")
+	};
+}
+
+fn test_postgres() -> Result<(), SimpleError> {
+	println!("Postgres: Not implemented yet");
+	return Ok(());
+}
+
+fn test_sqlite() -> Result<(), SimpleError> {
+	let (conn, table_name) = setup_sqlite().unwrap();
+	return match test_sqlite_json(conn, &table_name) {
+		Ok(()) => Ok(()),
+		// @TODO (2019-11-19, Jonathan) Extract sqlite error here
+		Err(_) => bail!("Error in testing sqlite")
+	};
+}
+
+fn setup_sqlite() -> SRResult<(PooledConnection<SqliteConnectionManager>, String)> {
+	fn setup_conn() -> PooledConnection<SqliteConnectionManager> {
+		let manager = SqliteConnectionManager::memory();
+		let pool = r2d2::Pool::new(manager).unwrap();
+		let conn = pool.get().unwrap();
+		conn
+	}
+	fn setup_db_structure(conn: &PooledConnection<SqliteConnectionManager>) -> SRResult<()> {
+		conn.execute(
+			"CREATE TABLE person (
                   id              INTEGER PRIMARY KEY,
                   name            TEXT NOT NULL,
                   time_created    TEXT NOT NULL,
-                  data            BLOB
+                  data            BLOB,
+                  data_null       BLOB
                   )",
-        params![],
-    )?;
-
-    conn.execute(
-        "INSERT INTO person (name, time_created, data)
-                  VALUES (?1, ?2, ?3)",
-        params!["Steven".to_string(), time::get_time(), None as Option<Vec<u8>>],
-    )?;
-
-    let mut stmt = conn.prepare("SELECT id, name, time_created, data FROM person")?;
-    let perjson_iter = stmt.query_map(params![], |row| {
-        Ok(from_row::<Map<String,Value>>(row).unwrap())
-    })?;
-
-    for perjson in perjson_iter {
-        println!("Found person {:?}", serde_json::to_string(&perjson.unwrap()).unwrap());
-    }
-    Ok(())
+			params![],
+		)?;
+
+		conn.execute(
+			"INSERT INTO person (name, time_created, data, data_null)
+                  VALUES (?1, ?2, ?3, ?4)",
+			params![
+            "Steven".to_string(),
+            time::get_time(),
+            "This is some text".to_string(),
+            None as Option<Vec<u8>>
+        ],
+		)?;
+		Ok(())
+	}
+	let conn = setup_conn();
+	setup_db_structure(&conn)?;
+	Ok((conn, "person".to_string()))
+}
+
+fn test_sqlite_json(conn: PooledConnection<SqliteConnectionManager>, table_name: &String) -> SRResult<()>{
+	let mut stmt = conn.prepare(&format!("SELECT * FROM {}", table_name))?;
+	let result_iter = stmt.query_map(params![], |row| {
+		Ok(from_row::<Map<String, Value>>(row).unwrap())
+	})?;
+	for cur_result in result_iter {
+		println!(
+			"Found row {:?}",
+			serde_json::to_string(&cur_result.unwrap()).unwrap()
+		);
+	}
+	Ok(())
 }