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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "notification_client.h" |
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#include <inttypes.h> |
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#include <string> |
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#include "crypto/signature.h" |
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#include "manifest.h" |
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#include "manifest_fetch.h" |
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#include "notify/messages.h" |
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#include "notify/subscriber_sse.h" |
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#include "notify/subscriber_supervisor.h" |
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#include "util/logging.h" |
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#include "util/posix.h" // IWYU pragma: keep |
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namespace { |
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class ActivitySubscriber : public notify::SubscriberSSE { |
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public: |
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ActivitySubscriber(const std::string &server_url, FuseRemounter *remounter, |
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download::DownloadManager *dl_mgr, |
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signature::SignatureManager *sig_mgr) |
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: SubscriberSSE(server_url) |
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, remounter_(remounter) |
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, dl_mgr_(dl_mgr) |
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, sig_mgr_(sig_mgr) { } |
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virtual ~ActivitySubscriber() { } |
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virtual notify::Subscriber::Status Consume(const std::string &repo_name, |
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const std::string &msg_text) { |
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notify::msg::Activity msg; |
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if (!msg.FromJSONString(msg_text)) { |
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LogCvmfs(kLogCvmfs, kLogSyslogErr, |
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"NotificationClient - could not decode message."); |
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return notify::Subscriber::kError; |
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} |
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manifest::ManifestEnsemble ensemble; |
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const manifest::Failures res = manifest::Verify( |
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reinterpret_cast<unsigned char *>(&(msg.manifest_[0])), |
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msg.manifest_.size(), "", repo_name, 0, NULL, sig_mgr_, dl_mgr_, |
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&ensemble); |
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if (res != manifest::kFailOk) { |
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LogCvmfs(kLogCvmfs, kLogSyslogErr, |
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"NotificationClient - manifest has invalid signature."); |
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return notify::Subscriber::kError; |
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} |
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const std::unique_ptr<manifest::Manifest> manifest( |
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manifest::Manifest::LoadMem( |
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reinterpret_cast<const unsigned char *>(msg.manifest_.data()), |
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msg.manifest_.size())); |
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if (manifest.get() == nullptr) { |
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LogCvmfs(kLogCvmfs, kLogSyslogErr, |
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"NotificationClient - could not parse manifest."); |
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return notify::Subscriber::kError; |
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} |
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const uint64_t new_revision = manifest->revision(); |
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LogCvmfs(kLogCvmfs, kLogSyslog, |
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"NotificationClient - repository %s is now at revision %" PRIu64 |
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", root hash: %s", |
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repo_name.c_str(), new_revision, |
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manifest->catalog_hash().ToString().c_str()); |
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const FuseRemounter::Status status = remounter_->CheckSynchronously(); |
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switch (status) { |
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case FuseRemounter::kStatusFailGeneral: |
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LogCvmfs(kLogCvmfs, kLogSyslog, "NotificationClient - remount failed"); |
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break; |
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case FuseRemounter::kStatusFailNoSpace: |
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LogCvmfs(kLogCvmfs, kLogSyslog, |
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"NotificationClient - remount failed (no space)"); |
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break; |
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case FuseRemounter::kStatusUp2Date: |
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LogCvmfs(kLogCvmfs, kLogSyslog, |
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"NotificationClient - catalog up to date"); |
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break; |
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case FuseRemounter::kStatusMaintenance: |
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LogCvmfs(kLogCvmfs, kLogSyslog, |
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"NotificationClient - in maintenance mode"); |
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break; |
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default: |
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LogCvmfs(kLogCvmfs, kLogSyslog, "NotificationClient - internal error"); |
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} |
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return notify::Subscriber::kContinue; |
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} |
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private: |
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FuseRemounter *remounter_; |
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download::DownloadManager *dl_mgr_; |
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signature::SignatureManager *sig_mgr_; |
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}; |
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} // namespace |
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NotificationClient::NotificationClient(const std::string &config, |
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const std::string &repo_name, |
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FuseRemounter *remounter, |
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download::DownloadManager *dl_mgr, |
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signature::SignatureManager *sig_mgr) |
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: config_(config) |
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, repo_name_(repo_name) |
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, remounter_(remounter) |
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, dl_mgr_(dl_mgr) |
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, sig_mgr_(sig_mgr) |
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, subscriber_() |
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, thread_() |
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, spawned_(false) { } |
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NotificationClient::~NotificationClient() { |
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if (subscriber_.get() != nullptr) { |
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subscriber_->Unsubscribe(); |
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} |
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if (spawned_) { |
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pthread_join(thread_, NULL); |
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spawned_ = false; |
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} |
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} |
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void NotificationClient::Spawn() { |
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if (!spawned_) { |
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if (pthread_create(&thread_, NULL, NotificationClient::Run, this)) { |
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LogCvmfs(kLogCvmfs, kLogSyslogErr, |
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"NotificationClient - Could not start background thread"); |
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} |
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spawned_ = true; |
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} |
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} |
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void *NotificationClient::Run(void *data) { |
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NotificationClient *cl = static_cast<NotificationClient *>(data); |
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cl->subscriber_.reset(new ActivitySubscriber(cl->config_, cl->remounter_, |
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cl->dl_mgr_, cl->sig_mgr_)); |
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LogCvmfs( |
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kLogCvmfs, kLogSyslog, |
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"NotificationClient - Entering subscription loop for repository: %s.", |
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cl->repo_name_.c_str()); |
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// Retry settings: accept no more than 10 failures in the last minute |
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const int num_retries = 10; |
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const uint64_t interval = 60; |
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notify::SubscriberSupervisor supervisor(cl->subscriber_.get(), cl->repo_name_, |
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num_retries, interval); |
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supervisor.Run(); |
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return NULL; |
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} |
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