本文整理汇总了Java中org.apache.cassandra.config.DatabaseDescriptor.loadSchemas方法的典型用法代码示例。如果您正苦于以下问题:Java DatabaseDescriptor.loadSchemas方法的具体用法?Java DatabaseDescriptor.loadSchemas怎么用?Java DatabaseDescriptor.loadSchemas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.loadSchemas方法的2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: main
import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
/**
* @param args a list of sstables whose metadata we are changing
*/
public static void main(String[] args) throws IOException
{
PrintStream out = System.out;
if (args.length < 2)
{
out.println("This command should be run with Cassandra stopped!");
out.println("Usage: sstableofflinerelevel [--dry-run] <keyspace> <columnfamily>");
System.exit(1);
}
boolean dryRun = args[0].equals("--dry-run");
String keyspace = args[args.length - 2];
String columnfamily = args[args.length - 1];
DatabaseDescriptor.loadSchemas(false);
if (Schema.instance.getCFMetaData(keyspace, columnfamily) == null)
throw new IllegalArgumentException(String.format("Unknown keyspace/columnFamily %s.%s",
keyspace,
columnfamily));
Keyspace ks = Keyspace.openWithoutSSTables(keyspace);
ColumnFamilyStore cfs = ks.getColumnFamilyStore(columnfamily);
Directories.SSTableLister lister = cfs.directories.sstableLister().skipTemporary(true);
Set<SSTableReader> sstables = new HashSet<>();
for (Map.Entry<Descriptor, Set<Component>> sstable : lister.list().entrySet())
{
if (sstable.getKey() != null)
{
try
{
SSTableReader reader = SSTableReader.open(sstable.getKey());
sstables.add(reader);
}
catch (Throwable t)
{
out.println("Couldn't open sstable: "+sstable.getKey().filenameFor(Component.DATA));
Throwables.propagate(t);
}
}
}
if (sstables.isEmpty())
{
out.println("No sstables to relevel for "+keyspace+"."+columnfamily);
System.exit(1);
}
Relevel rl = new Relevel(sstables);
rl.relevel(dryRun);
System.exit(0);
}
示例2: main
import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
/**
* @param args a list of sstables whose metadata we are changing
*/
public static void main(String[] args) throws IOException
{
PrintStream out = System.out;
if (args.length == 0)
{
out.println("This command should be run with Cassandra stopped!");
out.println("Usage: sstablelevelreset <keyspace> <columnfamily>");
System.exit(1);
}
if (!args[0].equals("--really-reset") || args.length != 3)
{
out.println("This command should be run with Cassandra stopped, otherwise you will get very strange behavior");
out.println("Verify that Cassandra is not running and then execute the command like this:");
out.println("Usage: sstablelevelreset --really-reset <keyspace> <columnfamily>");
System.exit(1);
}
// TODO several daemon threads will run from here.
// So we have to explicitly call System.exit.
try
{
// load keyspace descriptions.
DatabaseDescriptor.loadSchemas();
String keyspaceName = args[1];
String columnfamily = args[2];
// validate columnfamily
if (Schema.instance.getCFMetaData(keyspaceName, columnfamily) == null)
{
System.err.println("ColumnFamily not found: " + keyspaceName + "/" + columnfamily);
System.exit(1);
}
Keyspace keyspace = Keyspace.openWithoutSSTables(keyspaceName);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(columnfamily);
boolean foundSSTable = false;
for (Map.Entry<Descriptor, Set<Component>> sstable : cfs.directories.sstableLister().list().entrySet())
{
if (sstable.getValue().contains(Component.STATS))
{
foundSSTable = true;
Descriptor descriptor = sstable.getKey();
StatsMetadata metadata = (StatsMetadata) descriptor.getMetadataSerializer().deserialize(descriptor, MetadataType.STATS);
if (metadata.sstableLevel > 0)
{
out.println("Changing level from " + metadata.sstableLevel + " to 0 on " + descriptor.filenameFor(Component.DATA));
descriptor.getMetadataSerializer().mutateLevel(descriptor, 0);
}
else
{
out.println("Skipped " + descriptor.filenameFor(Component.DATA) + " since it is already on level 0");
}
}
}
if (!foundSSTable)
{
out.println("Found no sstables, did you give the correct keyspace/columnfamily?");
}
}
catch (Throwable t)
{
JVMStabilityInspector.inspectThrowable(t);
t.printStackTrace();
System.exit(1);
}
System.exit(0);
}