127 lines
3.1 KiB
Rust
127 lines
3.1 KiB
Rust
use std::io::Result as IoResult;
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use std::path::PathBuf;
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use toml::Value;
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use fs2::FileExt;
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use libimagstore::hook::Hook;
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use libimagstore::hook::accessor::HookDataAccessor as HDA;
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use libimagstore::hook::accessor::HookDataAccessorProvider;
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use libimagstore::hook::accessor::StoreIdAccessor;
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use libimagstore::hook::accessor::MutableHookDataAccessor;
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use libimagstore::hook::accessor::NonMutableHookDataAccessor;
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use libimagstore::hook::result::HookResult;
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use libimagstore::hook::error::{HookError, HookErrorKind};
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use libimagstore::storeid::StoreId;
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use libimagstore::store::FileLockEntry;
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use libimagstore::store::Entry;
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trait EntryFlock {
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fn lock(&self, store_location: &PathBuf) -> IoResult<()>;
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fn unlock(&self, store_location: &PathBuf) -> IoResult<()>;
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}
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impl EntryFlock for Entry {
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fn lock(&self, store_location: &PathBuf) -> IoResult<()> {
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use std::fs::File;
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let mut location = store_location.clone();
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location.push(self.get_location());
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File::open(location).and_then(|file| file.lock_exclusive())
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}
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fn unlock(&self, store_location: &PathBuf) -> IoResult<()> {
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use std::fs::File;
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let mut location = store_location.clone();
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location.push(self.get_location());
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File::open(location).and_then(|file| file.unlock())
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}
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}
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#[derive(PartialEq, Eq, Debug, Clone)]
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pub enum Action {
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Lock,
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Unlock
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}
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fn action_to_str(a: &Action) -> &'static str {
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match *a {
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Action::Lock => "lock",
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Action::Unlock => "unlock",
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}
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}
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#[derive(Debug, Clone)]
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pub struct FlockUpdateHook {
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action: Action,
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store_location: PathBuf,
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}
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impl FlockUpdateHook {
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pub fn new(action: Action, store_location: PathBuf) -> FlockUpdateHook {
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FlockUpdateHook {
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action: action,
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store_location: store_location,
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}
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}
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}
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impl Hook for FlockUpdateHook {
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fn name(&self) -> &'static str {
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"stdhook_flock_update"
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}
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fn set_config(&mut self, _: &Value) {
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() // We are not configurable here.
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}
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}
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impl HookDataAccessorProvider for FlockUpdateHook {
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fn accessor(&self) -> HDA {
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HDA::StoreIdAccess(self)
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}
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}
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impl StoreIdAccessor for FlockUpdateHook {
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fn access(&self, id: &StoreId) -> HookResult<()> {
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debug!("[FLOCK HOOK][{}] {:?}", action_to_str(&self.action), id);
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Ok(())
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}
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}
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impl MutableHookDataAccessor for FlockUpdateHook {
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fn access_mut(&self, fle: &mut FileLockEntry) -> HookResult<()> {
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debug!("[FLOCK HOOK][{}] {:?}", action_to_str(&self.action), fle.get_location());
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fle.lock(&self.store_location)
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.map_err(|e| HookError::new(HookErrorKind::HookExecutionError, Some(Box::new(e))))
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.map(|_| ())
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}
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}
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impl NonMutableHookDataAccessor for FlockUpdateHook {
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fn access(&self, fle: &FileLockEntry) -> HookResult<()> {
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debug!("[FLOCK HOOK][{}] {:?}", action_to_str(&self.action), fle.get_location());
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fle.unlock(&self.store_location)
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.map_err(|e| HookError::new(HookErrorKind::HookExecutionError, Some(Box::new(e))))
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.map(|_| ())
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}
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}
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