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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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#ifndef __STDC_FORMAT_MACROS |
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// NOLINTNEXTLINE |
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#define __STDC_FORMAT_MACROS |
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#endif |
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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 <vector> |
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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 "supervisor.h" |
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#include "util/logging.h" |
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#include "util/posix.h" |
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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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manifest::Failures res = |
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manifest::Verify(reinterpret_cast<unsigned char*>(&(msg.manifest_[0])), |
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msg.manifest_.size(), "", |
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repo_name, 0, NULL, sig_mgr_, dl_mgr_, &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 UniquePtr<manifest::Manifest> manifest(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.IsValid()) { |
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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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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", repo_name.c_str(), new_revision, |
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manifest->catalog_hash().ToString().c_str()); |
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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_.IsValid()) { |
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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_ = 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( |
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cl->subscriber_.weak_ref(), cl->repo_name_, num_retries, interval); |
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supervisor.Run(); |
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return NULL; |
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} |
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