本文整理汇总了Java中org.apache.cassandra.config.DatabaseDescriptor.getInitialTokens方法的典型用法代码示例。如果您正苦于以下问题：Java DatabaseDescriptor.getInitialTokens方法的具体用法？Java DatabaseDescriptor.getInitialTokens怎么用？Java DatabaseDescriptor.getInitialTokens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org.apache.cassandra.config.DatabaseDescriptor的用法示例。
在下文中一共展示了DatabaseDescriptor.getInitialTokens方法的3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: getBootstrapTokens
import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
/**
* if initialtoken was specified, use that (split on comma).
* otherwise, if allocationKeyspace is specified use the token allocation algorithm to generate suitable tokens
* else choose num_tokens tokens at random
*/
public static Collection<Token> getBootstrapTokens(final TokenMetadata metadata, InetAddress address) throws ConfigurationException
{
String allocationKeyspace = DatabaseDescriptor.getAllocateTokensForKeyspace();
Collection<String> initialTokens = DatabaseDescriptor.getInitialTokens();
if (initialTokens.size() > 0 && allocationKeyspace != null)
logger.warn("manually specified tokens override automatic allocation");
// if user specified tokens, use those
if (initialTokens.size() > 0)
return getSpecifiedTokens(metadata, initialTokens);
int numTokens = DatabaseDescriptor.getNumTokens();
if (numTokens < 1)
throw new ConfigurationException("num_tokens must be >= 1");
if (allocationKeyspace != null)
return allocateTokens(metadata, address, allocationKeyspace, numTokens);
if (numTokens == 1)
logger.warn("Picking random token for a single vnode. You should probably add more vnodes and/or use the automatic token allocation mechanism.");
return getRandomTokens(metadata, numTokens);
}
示例2: getBootstrapTokens
import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
/**
* if initialtoken was specified, use that (split on comma).
* otherwise, if num_tokens == 1, pick a token to assume half the load of the most-loaded node.
* else choose num_tokens tokens at random
*/
public static Collection<Token> getBootstrapTokens(final TokenMetadata metadata) throws ConfigurationException
{
Collection<String> initialTokens = DatabaseDescriptor.getInitialTokens();
// if user specified tokens, use those
if (initialTokens.size() > 0)
{
logger.debug("tokens manually specified as {}", initialTokens);
List<Token> tokens = new ArrayList<Token>(initialTokens.size());
for (String tokenString : initialTokens)
{
Token token = StorageService.getPartitioner().getTokenFactory().fromString(tokenString);
if (metadata.getEndpoint(token) != null)
throw new ConfigurationException("Bootstrapping to existing token " + tokenString + " is not allowed (decommission/removenode the old node first).");
tokens.add(token);
}
return tokens;
}
int numTokens = DatabaseDescriptor.getNumTokens();
if (numTokens < 1)
throw new ConfigurationException("num_tokens must be >= 1");
if (numTokens == 1)
logger.warn("Picking random token for a single vnode. You should probably add more vnodes; failing that, you should probably specify the token manually");
return getRandomTokens(metadata, numTokens);
}
示例3: getBootstrapTokens
import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
/**
* if initialtoken was specified, use that (split on comma).
* otherwise, if num_tokens == 1, pick a token to assume half the load of the most-loaded node.
* else choose num_tokens tokens at random
*/
public static Collection<Token> getBootstrapTokens(final TokenMetadata metadata, Map<InetAddress, Double> load) throws ConfigurationException
{
Collection<String> initialTokens = DatabaseDescriptor.getInitialTokens();
// if user specified tokens, use those
if (initialTokens.size() > 0)
{
logger.debug("tokens manually specified as {}", initialTokens);
List<Token> tokens = new ArrayList<Token>(initialTokens.size());
for (String tokenString : initialTokens)
{
Token token = StorageService.getPartitioner().getTokenFactory().fromString(tokenString);
if (metadata.getEndpoint(token) != null)
throw new ConfigurationException("Bootstraping to existing token " + tokenString + " is not allowed (decommission/removetoken the old node first).");
tokens.add(token);
}
return tokens;
}
int numTokens = DatabaseDescriptor.getNumTokens();
if (numTokens < 1)
throw new ConfigurationException("num_tokens must be >= 1");
if (numTokens == 1)
logger.warn("Picking random token for a single vnode. You should probably add more vnodes; failing that, you should probably specify the token manually");
return getRandomTokens(metadata, numTokens);
}