diff options
Diffstat (limited to 'config-provisioning')
| -rw-r--r-- | config-provisioning/src/main/java/com/yahoo/config/provision/HostLivenessTracker.java | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/HostLivenessTracker.java b/config-provisioning/src/main/java/com/yahoo/config/provision/HostLivenessTracker.java new file mode 100644 index 00000000000..f3326ec2bc8 --- /dev/null +++ b/config-provisioning/src/main/java/com/yahoo/config/provision/HostLivenessTracker.java @@ -0,0 +1,24 @@ +// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +package com.yahoo.config.provision; + +import java.time.Instant; +import java.util.Optional; + +/** + * Instances of this are used to keep track of (notify and query) + * which hosts are currently connected to the config system. + * + * @author bratseth + */ +public interface HostLivenessTracker { + + /** Called each time a config request is received from a client */ + void receivedRequestFrom(String hostname); + + /** + * Returns the epoch timestamp of the last request received from the given hostname, + * or empty if there is no memory of this host making a request + */ + Optional<Instant> lastRequestFrom(String hostname); + +} |