@Override
public Result check() throws Exception {
HealthCheckResults results = _pool.checkForHealthyEndPoint();
boolean healthy = results.hasHealthyResult();
HealthCheckResult healthyResult = results.getHealthyResult();
// Get stats about any failed health checks
int numUnhealthy = 0;
long totalUnhealthyResponseTimeInMicros = 0;
for (HealthCheckResult unhealthy : results.getUnhealthyResults()) {
++numUnhealthy;
totalUnhealthyResponseTimeInMicros += unhealthy.getResponseTime(TimeUnit.MICROSECONDS);
}
if (!healthy && numUnhealthy == 0) {
return Result.unhealthy("No end points.");
}
String unhealthyMessage =
numUnhealthy + " failures in " + totalUnhealthyResponseTimeInMicros + "us";
if (!healthy) {
return Result.unhealthy(unhealthyMessage);
}
return Result.healthy(
healthyResult.getEndPointId()
+ " succeeded in "
+ healthyResult.getResponseTime(TimeUnit.MICROSECONDS)
+ "us; "
+ unhealthyMessage);
}
@Override
protected Result check() throws Exception {
try {
PreparedStatement pst = connection.prepareStatement("SELECT * FROM RECEIPTS LIMIT 1");
if (pst.execute()) {
return Result.healthy();
} else {
return Result.unhealthy("Failed to query Phoenix Receipts table.");
}
} catch (SQLException sqlEx) {
logger.warn("Phoenix Health Check has encountered errors!");
return Result.unhealthy("Failed to connect to Phoenix");
}
}
@Override
protected Result check() throws Exception {
if (gaia.ping()) {
return Result.healthy();
}
return Result.unhealthy("gaia ping returned something else than 200 OK");
}
@Override
protected Result check() throws Exception {
final String saying = String.format(template, "TEST");
if (!saying.contains("TEST")) {
return Result.unhealthy("template doesn't include a name");
}
return Result.healthy();
}
@Override
protected Result check() throws Exception {
if (dead.get()) {
return Result.unhealthy("Marked as down.");
} else {
return Result.healthy("Marked as up.");
}
}
@Override
protected Result check() throws Exception {
if (hibernateBundle.getSessionFactory().isClosed()) {
return Result.unhealthy("Database Session is closed");
} else {
return Result.healthy("Database Session is open for requests");
}
}
@Override
protected Result check() throws Exception {
try {
ProcessEngines.getDefaultProcessEngine().getIdentityService().createGroupQuery().list();
return Result.healthy();
} catch (final Exception e) {
return Result.unhealthy(e);
}
}
@Override
public Result check() {
try {
javaMailSender.getSession().getTransport().connect();
return Result.healthy();
} catch (MessagingException e) {
log.debug("Cannot connect to e-mail server: {}", e);
return Result.unhealthy("Cannot connect to e-mail server");
}
}
@Override
protected Result check() throws Exception {
try {
// String statement = "select * from system.schema_keyspaces;";
String statement = "select * from system.paxos;";
ResultSet resultSet = session.execute(statement);
return Result.healthy();
} catch (Exception e) {
return Result.unhealthy(e.toString());
}
}
@Override
protected Result check() throws Exception {
ClusterHealthResponse health =
client.admin().cluster().prepareHealth(ElasticsearchSearcher.INDEX).execute().actionGet();
// though it sounds bad, status yellow is in fact ok for our setup
if (health.getStatus() != ClusterHealthStatus.RED) {
return Result.healthy();
} else {
return Result.unhealthy(health.getStatus().name());
}
}
@Override
protected Result check() throws Exception {
ExecutorService executor = null;
try {
executor = Executors.newSingleThreadExecutor();
Future<String> future = executor.submit(() -> mongo.listDatabaseNames().first());
String dbName = future.get(250, TimeUnit.MILLISECONDS);
if (StringUtils.isEmpty(dbName)) return Result.unhealthy("Can't connect to database.");
return Result.healthy();
} catch (Exception e) {
return Result.unhealthy(e);
} finally {
if (executor != null) executor.shutdownNow();
}
}
@Override
public Result check() {
try {
javaMailSender
.getSession()
.getTransport()
.connect(
javaMailSender.getHost(), javaMailSender.getUsername(), javaMailSender.getPassword());
return Result.healthy();
} catch (Exception e) {
log.debug("Cannot connect to e-mail server: {}", e);
return Result.unhealthy("Cannot connect to e-mail server");
}
}
/** Check to see if the system is healthy (doesn't have too many messages). */
@Override
protected Result check() throws Exception {
// Running total.
int numberOfMessages = 0;
// Iterate over all mailboxes
for (List<UserNotification> notificationsPerUser :
this.notificationMailbox.getAllNotifications().values()) {
// Add the messages per mailbox to our running total.
numberOfMessages += notificationsPerUser.size();
}
// If the number of messages in the system exceeds our limit,
// the system is unhealthy.
return (numberOfMessages > UNHEALTHY_NUMBER_OF_MESSAGES)
? Result.unhealthy(String.format("too many messages: %s", numberOfMessages))
: Result.healthy();
}
