public static void deleteTest(String tableStr) {
try {
Configuration conf = HBaseConfiguration.create();
byte[] tableName = Bytes.toBytes(tableStr);
HConnection hConnection = HConnectionManager.createConnection(conf);
HTableInterface table = hConnection.getTable(tableName);
byte[] startRow = Bytes.toBytes("rowKey_1");
byte[] stopRow = Bytes.toBytes("rowKey_3");
byte[] family = f0;
Scan scan = new Scan();
scan.addFamily(family);
scan.setMaxVersions(1);
// scan.setStartRow(startRow);
// scan.setStopRow(stopRow);
ResultScanner scanner = table.getScanner(scan);
Result result = scanner.next();
List<Delete> delete = new ArrayList<Delete>();
while (result != null) {
Delete del = new Delete(result.getRow());
delete.add(del);
result = scanner.next();
}
table.delete(delete);
System.out.println("delete done");
table.close(); // very important
} catch (IOException e) {
e.printStackTrace();
}
}
public static void writeTest(String tableStr) {
try {
Configuration conf = HBaseConfiguration.create();
byte[] tableName = Bytes.toBytes(tableStr);
HConnection hConnection = HConnectionManager.createConnection(conf);
HTableInterface table = hConnection.getTable(tableName);
byte[] family = f0;
List<Put> puts = new ArrayList<Put>();
for (int k = 0; k < 10; k++) // 写10行数据
{
byte[] rowkey = Bytes.toBytes("rowKey_" + k);
Put p = new Put(rowkey);
byte[] value_id = Bytes.toBytes("123456");
byte[] value_user = Bytes.toBytes("mengqinghao" + k);
p.add(family, qualifier_id, value_id);
p.add(family, qualifier_user, value_user);
puts.add(p);
}
table.put(puts);
System.out.println("Puts done: " + puts.size());
table.close(); // very important
} catch (IOException e) {
e.printStackTrace();
}
}
public static void readTest(String tableStr, String row) {
try {
Configuration conf = HBaseConfiguration.create();
byte[] tableName = Bytes.toBytes(tableStr);
HConnection hConnection = HConnectionManager.createConnection(conf);
HTableInterface table = hConnection.getTable(tableName);
byte[] rowkey = Bytes.toBytes(row);
Get get = new Get(rowkey);
get.addFamily(f0);
Result result = table.get(get);
NavigableMap<byte[], byte[]> m = result.getFamilyMap(f0);
if (m == null || m.isEmpty()) {
System.err.println("Empty." + m);
return;
}
for (Map.Entry<byte[], byte[]> entry : m.entrySet()) {
String qualifier = Bytes.toString(entry.getKey());
String value = Bytes.toString(entry.getValue());
System.out.println(qualifier + ":" + value);
}
table.close(); // very important
} catch (IOException e) {
e.printStackTrace();
}
}
public static void scanTest(String tableStr) {
try {
Configuration conf = HBaseConfiguration.create();
byte[] tableName = Bytes.toBytes(tableStr);
HConnection hConnection = HConnectionManager.createConnection(conf);
HTableInterface table = hConnection.getTable(tableName);
byte[] startRow = Bytes.toBytes("rowKey_0");
byte[] stopRow = Bytes.toBytes("rowKey_6");
byte[] family = f0;
Scan scan = new Scan();
scan.addFamily(family);
scan.setMaxVersions(1);
// scan.setStartRow(startRow);
// scan.setStopRow(stopRow);
int count = 0;
ResultScanner scanner = table.getScanner(scan);
Result result = scanner.next();
while (result != null) {
String rowKey = Bytes.toString(result.getRow());
NavigableMap<byte[], byte[]> m = result.getFamilyMap(family);
if (m == null || m.isEmpty()) {
System.err.println("Empty." + m);
return;
}
for (Map.Entry<byte[], byte[]> entry : m.entrySet()) {
String qualifier = Bytes.toString(entry.getKey());
String value = Bytes.toString(entry.getValue());
System.out.println(rowKey + ":" + qualifier + ":" + value);
}
result = scanner.next();
count++;
System.out.println("-----------------------------");
}
table.close(); // very important
System.out.println("count:" + count);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public int run(String[] arg0) throws Exception {
int errCode = 0;
// TODO: Make command options.
// How many servers to fake.
final int servers = 1;
// How many regions to put on the faked servers.
final int regions = 100000;
// How many 'keys' in the faked regions.
final long namespaceSpan = 50000000;
// How long to take to pause after doing a put; make this long if you want to fake a struggling
// server.
final long multiPause = 0;
// Check args make basic sense.
if ((namespaceSpan < regions) || (regions < servers)) {
throw new IllegalArgumentException(
"namespaceSpan="
+ namespaceSpan
+ " must be > regions="
+ regions
+ " which must be > servers="
+ servers);
}
// Set my many servers and many regions faking connection in place.
getConf().set("hbase.client.connection.impl", ManyServersManyRegionsConnection.class.getName());
// Use simple kv registry rather than zk
getConf().set("hbase.client.registry.impl", SimpleRegistry.class.getName());
// When to report fails. Default is we report the 10th. This means we'll see log everytime
// an exception is thrown -- usually RegionTooBusyException when we have more than
// hbase.test.multi.too.many requests outstanding at any time.
getConf().setInt("hbase.client.start.log.errors.counter", 0);
// Ugly but this is only way to pass in configs.into ManyServersManyRegionsConnection class.
getConf().setInt("hbase.test.regions", regions);
getConf().setLong("hbase.test.namespace.span", namespaceSpan);
getConf().setLong("hbase.test.servers", servers);
getConf().set("hbase.test.tablename", Bytes.toString(BIG_USER_TABLE));
getConf().setLong("hbase.test.multi.pause.when.done", multiPause);
// Let there be ten outstanding requests at a time before we throw RegionBusyException.
getConf().setInt("hbase.test.multi.too.many", 10);
final int clients = 2;
// Have them all share the same connection so they all share the same instance of
// ManyServersManyRegionsConnection so I can keep an eye on how many requests by server.
final ExecutorService pool = Executors.newCachedThreadPool(Threads.getNamedThreadFactory("p"));
// Executors.newFixedThreadPool(servers * 10, Threads.getNamedThreadFactory("p"));
// Share a connection so I can keep counts in the 'server' on concurrency.
final HConnection sharedConnection = HConnectionManager.createConnection(getConf() /*, pool*/);
try {
Thread[] ts = new Thread[clients];
for (int j = 0; j < ts.length; j++) {
final int id = j;
ts[j] =
new Thread("" + j) {
final Configuration c = getConf();
@Override
public void run() {
try {
cycle(id, c, sharedConnection);
} catch (IOException e) {
e.printStackTrace();
}
}
};
ts[j].start();
}
for (int j = 0; j < ts.length; j++) {
ts[j].join();
}
} finally {
sharedConnection.close();
}
return errCode;
}
/**
* Create a new ClientSmallScanner for the specified table. An HConnection will be retrieved using
* the passed Configuration. Note that the passed {@link Scan} 's start row maybe changed.
*
* @param conf The {@link Configuration} to use.
* @param scan {@link Scan} to use in this scanner
* @param tableName The table that we wish to rangeGet
* @throws IOException
*/
public ClientSmallScanner(final Configuration conf, final Scan scan, final TableName tableName)
throws IOException {
this(conf, scan, tableName, HConnectionManager.getConnection(conf));
}
