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56 lines
1.7 KiB
Java
56 lines
1.7 KiB
Java
package com.twitter.search.earlybird;
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import org.apache.zookeeper.KeeperException;
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import com.twitter.common.zookeeper.ServerSet;
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import com.twitter.common.zookeeper.ZooKeeperClient;
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/**
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* Represents a server that can add and remove itself from a server set.
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*/
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public interface ServerSetMember {
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/**
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* Makes this server join its server set.
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*
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* @throws ServerSet.UpdateException
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* @param requestSource
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*/
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void joinServerSet(String requestSource) throws ServerSet.UpdateException;
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/**
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* Makes this server leave its server set.
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*
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* @throws ServerSet.UpdateException
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* @param requestSource
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*/
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void leaveServerSet(String requestSource) throws ServerSet.UpdateException;
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/**
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* Gets and returns the current number of members in this server's server set.
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*
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* @return number of members currently in this host's server set.
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* @throws InterruptedException
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* @throws ZooKeeperClient.ZooKeeperConnectionException
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* @throws KeeperException
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*/
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int getNumberOfServerSetMembers() throws InterruptedException,
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ZooKeeperClient.ZooKeeperConnectionException, KeeperException;
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/**
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* Checks if this earlybird is in the server set.
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*
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* @return true if it is, false otherwise.
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*/
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boolean isInServerSet();
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/**
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* Should only be called for Archive Earlybirds.
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*
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* Join ServerSet for ServiceProxy with a named admin port and with a zookeeper path that Service
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* Proxy can translate to a domain name label that is less than 64 characters (due to the size
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* limit for domain name labels described here: https://tools.ietf.org/html/rfc1035)
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* This will allow us to access Earlybirds that are not on mesos via ServiceProxy.
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*/
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void joinServerSetForServiceProxy();
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}
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