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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_JOURNAL_JOURNAL_TRIMMER_H
#define CEPH_JOURNAL_JOURNAL_TRIMMER_H
#include "include/int_types.h"
#include "include/rados/librados.hpp"
#include "include/Context.h"
#include "common/AsyncOpTracker.h"
#include "journal/JournalMetadata.h"
#include "cls/journal/cls_journal_types.h"
#include <functional>
struct Context;
namespace journal {
class JournalTrimmer {
public:
typedef cls::journal::ObjectSetPosition ObjectSetPosition;
JournalTrimmer(librados::IoCtx &ioctx, const std::string &object_oid_prefix,
const ceph::ref_t<JournalMetadata> &journal_metadata);
~JournalTrimmer();
void shut_down(Context *on_finish);
void remove_objects(bool force, Context *on_finish);
void committed(uint64_t commit_tid);
private:
typedef std::function<Context*()> CreateContext;
struct MetadataListener : public JournalMetadataListener {
JournalTrimmer *journal_trimmer;
MetadataListener(JournalTrimmer *journal_trimmer)
: journal_trimmer(journal_trimmer) {
}
void handle_update(JournalMetadata *) override {
journal_trimmer->handle_metadata_updated();
}
};
struct C_CommitPositionSafe : public Context {
JournalTrimmer *journal_trimmer;
C_CommitPositionSafe(JournalTrimmer *_journal_trimmer)
: journal_trimmer(_journal_trimmer) {
journal_trimmer->m_async_op_tracker.start_op();
}
~C_CommitPositionSafe() override {
journal_trimmer->m_async_op_tracker.finish_op();
}
void finish(int r) override {
}
};
struct C_RemoveSet;
librados::IoCtx m_ioctx;
CephContext *m_cct;
std::string m_object_oid_prefix;
ceph::ref_t<JournalMetadata> m_journal_metadata;
MetadataListener m_metadata_listener;
AsyncOpTracker m_async_op_tracker;
ceph::mutex m_lock = ceph::make_mutex("JournalTrimmer::m_lock");
bool m_remove_set_pending;
uint64_t m_remove_set;
Context *m_remove_set_ctx;
bool m_shutdown = false;
CreateContext m_create_commit_position_safe_context = [this]() {
return new C_CommitPositionSafe(this);
};
void trim_objects(uint64_t minimum_set);
void remove_set(uint64_t object_set);
void handle_metadata_updated();
void handle_set_removed(int r, uint64_t object_set);
};
} // namespace journal
#endif // CEPH_JOURNAL_JOURNAL_TRIMMER_H
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