1.1--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2+++ b/examples/db/cl-simple-example-raw.lisp	Thu Apr 11 18:58:35 2024 -0400
     1.3@@ -0,0 +1,66 @@
     1.4+;;; cl-simple-example.lisp --- Common Lisp port of rocksdb/examples/c_simple_example.c
     1.5+
     1.6+;; ref: https://github.com/facebook/rocksdb/blob/main/examples/c_simple_example.c
     1.7+
     1.8+;;; Usage: 
     1.9+
    1.10+;; To compile and run from the shell:
    1.11+#|
    1.12+sbcl --eval '(ql:quickload :rdb)' \
    1.13+     --eval '(ql:quickload :cli)' \
    1.14+     --eval '(compile-file "cl-simple-example.lisp")' \
    1.15+     --eval '(load "cl-simple-example.fasl")' \
    1.16+     --eval "(sb-ext:save-lisp-and-die \"cl-simple-example\" :toplevel #'cl-simple-example::main :executable t)"
    1.17+
    1.18+time ./cl-simple-example
    1.19+
    1.20+# real	0m0.030s
    1.21+# user	0m0.012s
    1.22+# sys	0m0.017s
    1.23+|#
    1.24+
    1.25+;; Compare to C:
    1.26+#|
    1.27+# in rocksdb/examples
    1.28+gcc -lrocksdb c_simple_example.c -oc_simple_example
    1.29+
    1.30+time ./c_simple_example
    1.31+
    1.32+# real	0m0.021s
    1.33+# user	0m0.006s
    1.34+# sys	0m0.015s
    1.35+|#
    1.36+
    1.37+;;; Code:
    1.38+(defpackage :examples/cl-simple-example-raw
    1.39+  (:use :cl :std :cli :rdb :sb-alien :rocksdb)
    1.40+  (:export :main))
    1.41+
    1.42+(in-package :examples/cl-simple-example-raw)
    1.43+(declaim (optimize (speed 3)))
    1.44+
    1.45+(defparameter *num-cpus* (num-cpus)
    1.46+  "CPU count.")
    1.47+
    1.48+(defparameter *db-path* "/tmp/rocksdb-cl-simple-example-raw")
    1.49+
    1.50+(defparameter *db-backup-path* "/tmp/rocksdb-cl-simple-example-backup-raw")
    1.51+
    1.52+(defmain ()
    1.53+  ;; open Backup Engine that we will use for backing up our database
    1.54+  (let ((options (make-rocksdb-options 
    1.55+                  (lambda (opt)
    1.56+                    (rocksdb-options-increase-parallelism opt *num-cpus*) ;; set # of online cores
    1.57+                    (rocksdb-options-optimize-level-style-compaction opt 0)
    1.58+                    (rocksdb-options-set-create-if-missing opt 1)))))
    1.59+  (with-open-backup-engine-raw (be *db-backup-path* options)
    1.60+    ;; open DB
    1.61+    (with-open-db-raw (db *db-path* options)
    1.62+      ;; put key-value
    1.63+      (put-kv-str-raw db "key" "value")
    1.64+      ;; get value
    1.65+      (string= (get-kv-str-raw db "key") "value")
    1.66+      ;; create new backup in a directory specified by *db-backup-path*
    1.67+      (create-new-backup-raw be db))
    1.68+    ;; if something is wrong, you might want to restore data from last backup
    1.69+    (restore-from-latest-backup-raw be *db-path* *db-backup-path*))))