本文整理汇总了C++中ShardingState::refreshMetadataIfNeeded方法的典型用法代码示例。如果您正苦于以下问题：C++ ShardingState::refreshMetadataIfNeeded方法的具体用法？C++ ShardingState::refreshMetadataIfNeeded怎么用？C++ ShardingState::refreshMetadataIfNeeded使用的例子？那么, 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ShardingState的用法示例。
在下文中一共展示了ShardingState::refreshMetadataIfNeeded方法的1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C++代码示例。
示例1: run
//.........这里部分代码省略.........
}
errmsg = "shard global version for collection is higher than trying to set to '" + ns + "'";
result.append( "ns" , ns );
version.addToBSON( result, "version" );
globalVersion.addToBSON( result, "globalVersion" );
result.appendBool( "reloadConfig" , true );
return false;
}
if ( ! globalVersion.isSet() && ! authoritative ) {
// Needed b/c when the last chunk is moved off a shard, the version gets reset to zero, which
// should require a reload.
while ( shardingState.inCriticalMigrateSection() ) {
log() << "waiting till out of critical section" << endl;
shardingState.waitTillNotInCriticalSection( 10 );
}
// need authoritative for first look
result.append( "ns" , ns );
result.appendBool( "need_authoritative" , true );
errmsg = "first time for collection '" + ns + "'";
return false;
}
// Fall through to metadata reload below
}
else {
// Dropping
if ( ! authoritative ) {
result.appendBool( "need_authoritative" , true );
result.append( "ns" , ns );
globalVersion.addToBSON( result, "globalVersion" );
errmsg = "dropping needs to be authoritative";
return false;
}
// Fall through to metadata reload below
}
ChunkVersion currVersion;
Status status = shardingState.refreshMetadataIfNeeded( ns, version, &currVersion );
if (!status.isOK()) {
// The reload itself was interrupted or confused here
errmsg = str::stream() << "could not refresh metadata for " << ns
<< " with requested shard version " << version.toString()
<< ", stored shard version is " << currVersion.toString()
<< causedBy( status.reason() );
warning() << errmsg << endl;
result.append( "ns" , ns );
version.addToBSON( result, "version" );
currVersion.addToBSON( result, "globalVersion" );
result.appendBool( "reloadConfig", true );
return false;
}
else if ( !version.isWriteCompatibleWith( currVersion ) ) {
// We reloaded a version that doesn't match the version mongos was trying to
// set.
errmsg = str::stream() << "requested shard version differs from"
<< " config shard version for " << ns
<< ", requested version is " << version.toString()
<< " but found version " << currVersion.toString();
OCCASIONALLY warning() << errmsg << endl;
// WARNING: the exact fields below are important for compatibility with mongos
// version reload.
result.append( "ns" , ns );
currVersion.addToBSON( result, "globalVersion" );
// If this was a reset of a collection or the last chunk moved out, inform mongos to
// do a full reload.
if (currVersion.epoch() != version.epoch() || !currVersion.isSet() ) {
result.appendBool( "reloadConfig", true );
// Zero-version also needed to trigger full mongos reload, sadly
// TODO: Make this saner, and less impactful (full reload on last chunk is bad)
ChunkVersion( 0, 0, OID() ).addToBSON( result, "version" );
// For debugging
version.addToBSON( result, "origVersion" );
}
else {
version.addToBSON( result, "version" );
}
return false;
}
info->setVersion( ns , version );
return true;
}