本文整理汇总了Java中org.apache.cassandra.db.SystemKeyspace.loadPaxosState方法的典型用法代码示例。如果您正苦于以下问题：Java SystemKeyspace.loadPaxosState方法的具体用法？Java SystemKeyspace.loadPaxosState怎么用？Java SystemKeyspace.loadPaxosState使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.cassandra.db.SystemKeyspace的用法示例。
在下文中一共展示了SystemKeyspace.loadPaxosState方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: prepare
import org.apache.cassandra.db.SystemKeyspace; //导入方法依赖的package包/类
public static PrepareResponse prepare(Commit toPrepare)
{
synchronized (lockFor(toPrepare.key))
{
PaxosState state = SystemKeyspace.loadPaxosState(toPrepare.key, toPrepare.update.metadata());
if (toPrepare.isAfter(state.promised))
{
Tracing.trace("Promising ballot {}", toPrepare.ballot);
SystemKeyspace.savePaxosPromise(toPrepare);
return new PrepareResponse(true, state.accepted, state.mostRecentCommit);
}
else
{
Tracing.trace("Promise rejected; {} is not sufficiently newer than {}", toPrepare, state.promised);
// return the currently promised ballot (not the last accepted one) so the coordinator can make sure it uses newer ballot next time (#5667)
return new PrepareResponse(false, state.promised, state.mostRecentCommit);
}
}
}
示例2: propose
import org.apache.cassandra.db.SystemKeyspace; //导入方法依赖的package包/类
public static Boolean propose(Commit proposal)
{
synchronized (lockFor(proposal.key))
{
PaxosState state = SystemKeyspace.loadPaxosState(proposal.key, proposal.update.metadata());
if (proposal.hasBallot(state.promised.ballot) || proposal.isAfter(state.promised))
{
Tracing.trace("Accepting proposal {}", proposal);
SystemKeyspace.savePaxosProposal(proposal);
return true;
}
else
{
Tracing.trace("Rejecting proposal for {} because inProgress is now {}", proposal, state.promised);
return false;
}
}
}
示例3: prepare
import org.apache.cassandra.db.SystemKeyspace; //导入方法依赖的package包/类
public static PrepareResponse prepare(Commit toPrepare)
{
Lock lock = LOCKS.get(toPrepare.key);
lock.lock();
try
{
PaxosState state = SystemKeyspace.loadPaxosState(toPrepare.key, toPrepare.update.metadata());
if (toPrepare.isAfter(state.promised))
{
Tracing.trace("Promising ballot {}", toPrepare.ballot);
SystemKeyspace.savePaxosPromise(toPrepare);
return new PrepareResponse(true, state.accepted, state.mostRecentCommit);
}
else
{
Tracing.trace("Promise rejected; {} is not sufficiently newer than {}", toPrepare, state.promised);
// return the currently promised ballot (not the last accepted one) so the coordinator can make sure it uses newer ballot next time (#5667)
return new PrepareResponse(false, state.promised, state.mostRecentCommit);
}
}
finally
{
lock.unlock();
}
}
示例4: propose
import org.apache.cassandra.db.SystemKeyspace; //导入方法依赖的package包/类
public static Boolean propose(Commit proposal)
{
Lock lock = LOCKS.get(proposal.key);
lock.lock();
try
{
PaxosState state = SystemKeyspace.loadPaxosState(proposal.key, proposal.update.metadata());
if (proposal.hasBallot(state.promised.ballot) || proposal.isAfter(state.promised))
{
Tracing.trace("Accepting proposal {}", proposal);
SystemKeyspace.savePaxosProposal(proposal);
return true;
}
else
{
Tracing.trace("Rejecting proposal for {} because inProgress is now {}", proposal, state.promised);
return false;
}
}
finally
{
lock.unlock();
}
}