...

2 files changed, 58 insertions, 0 deletions

diff --git a/examples/.gitignore b/examples/.gitignore
new file mode 100644
index 0000000..7d977f4
--- /dev/null
+++ b/examples/.gitignore
@@ -0,0 +1,2 @@
+demo
+testdb
diff --git a/examples/demo1.rs b/examples/demo1.rs
new file mode 100644
index 0000000..0f50ec3
--- /dev/null
+++ b/examples/demo1.rs
@@ -0,0 +1,56 @@
+use growthring::{WALFile, WALStore, WALPos, WALBytes, WALLoader, WALWriter};
+
+struct WALFileFake {
+    filename: String
+}
+
+impl WALFile for WALFileFake {
+    fn allocate(&self, offset: WALPos, length: usize) {
+        println!("{}.allocate(offset=0x{:x}, end=0x{:x})", self.filename, offset, offset + length as u64);
+    }
+    fn write(&self, offset: WALPos, data: WALBytes) {
+        println!("{}.write(offset=0x{:x}, end=0x{:x}, data=0x{})", self.filename, offset, offset + data.len() as u64, hex::encode(data));
+    }
+    fn read(&self, offset: WALPos, length: usize) -> WALBytes {
+        Vec::new().into_boxed_slice()
+    }
+}
+
+struct WALStoreFake;
+impl WALStore for WALStoreFake {
+    fn open_file(&self, filename: &str, touch: bool) -> Option<Box<dyn WALFile>> {
+        println!("open_file(filename={}, touch={}", filename, touch);
+        let filename = filename.to_string();
+        Some(Box::new(WALFileFake{ filename }))
+    }
+    fn remove_file(&self, filename: &str) -> bool {
+        println!("remove_file(filename={})", filename);
+        true
+    }
+    fn enumerate_files(&self) -> Box<[String]> {
+        println!("enumerate_files()");
+        Vec::new().into_boxed_slice()
+    }
+    fn apply_payload(&self, payload: WALBytes) {
+        println!("apply_payload(payload=0x{})", hex::encode(payload))
+    }
+}
+
+fn test(records: Vec<String>, wal: &mut WALWriter<WALStoreFake>) {
+    let records: Vec<WALBytes> = records.into_iter().map(|s| s.into_bytes().into_boxed_slice()).collect();
+    let ret = wal.grow(&records);
+    for ring_id in ret.iter() {
+        println!("got ring id: {:?}", ring_id);
+    }
+}
+
+fn main() {
+    let store = WALStoreFake;
+    let mut wal = WALLoader::new(store, 9, 8, 1000).recover();
+    for _ in 0..3 {
+        test(["hi", "hello", "lol"].iter().map(|s| s.to_string()).collect::<Vec<String>>(), &mut wal)
+    }
+    for _ in 0..3 {
+        test(["a".repeat(10), "b".repeat(100), "c".repeat(1000)].iter().map(|s| s.to_string()).collect::<Vec<String>>(), &mut wal)
+    }
+}