in hbase-examples/src/main/java/org/apache/hadoop/hbase/thrift/DemoClient.java [99:346]
private void run() throws Exception {
TTransport transport = new TSocket(host, port);
if (secure) {
Map<String, String> saslProperties = new HashMap<>();
saslProperties.put(Sasl.QOP, "auth-conf,auth-int,auth");
/*
* The Thrift server the DemoClient is trying to connect to must have a matching principal,
* and support authentication. The HBase cluster must be secure, allow proxy user.
*/
transport = new TSaslClientTransport("GSSAPI", null, serverPrincipal, // Thrift server user
// name, should be an
// authorized proxy
// user.
host, // Thrift server domain
saslProperties, null, transport);
}
transport.open();
TProtocol protocol = new TBinaryProtocol(transport, true, true);
Hbase.Client client = new Hbase.Client(protocol);
ByteBuffer demoTable = ByteBuffer.wrap(bytes("demo_table"));
ByteBuffer disabledTable = ByteBuffer.wrap(bytes("disabled_table"));
// Scan all tables, look for the demo table and delete it.
System.out.println("scanning tables...");
for (ByteBuffer name : client.getTableNames()) {
System.out.println(" found: " + ClientUtils.utf8(name));
if (name.equals(demoTable) || name.equals(disabledTable)) {
if (client.isTableEnabled(name)) {
System.out.println(" disabling table: " + ClientUtils.utf8(name));
client.disableTable(name);
}
System.out.println(" deleting table: " + ClientUtils.utf8(name));
client.deleteTable(name);
}
}
// Create the demo table with two column families, entry: and unused:
ArrayList<ColumnDescriptor> columns = new ArrayList<>(2);
ColumnDescriptor col;
col = new ColumnDescriptor();
col.name = ByteBuffer.wrap(bytes("entry:"));
col.timeToLive = Integer.MAX_VALUE;
col.maxVersions = 10;
columns.add(col);
col = new ColumnDescriptor();
col.name = ByteBuffer.wrap(bytes("unused:"));
col.timeToLive = Integer.MAX_VALUE;
columns.add(col);
System.out.println("creating table: " + ClientUtils.utf8(demoTable.array()));
try {
client.createTable(demoTable, columns);
client.createTable(disabledTable, columns);
} catch (AlreadyExists ae) {
System.out.println("WARN: " + ae.message);
}
System.out.println("column families in " + ClientUtils.utf8(demoTable.array()) + ": ");
Map<ByteBuffer, ColumnDescriptor> columnMap = client.getColumnDescriptors(demoTable);
for (ColumnDescriptor col2 : columnMap.values()) {
System.out.println(
" column: " + ClientUtils.utf8(col2.name.array()) + ", maxVer: " + col2.maxVersions);
}
if (client.isTableEnabled(disabledTable)) {
System.out.println("disabling table: " + ClientUtils.utf8(disabledTable.array()));
client.disableTable(disabledTable);
}
System.out.println("list tables with enabled statuses : ");
Map<ByteBuffer, Boolean> statusMap = client.getTableNamesWithIsTableEnabled();
for (Map.Entry<ByteBuffer, Boolean> entry : statusMap.entrySet()) {
System.out.println(" Table: " + ClientUtils.utf8(entry.getKey().array()) + ", is enabled: "
+ entry.getValue());
}
Map<ByteBuffer, ByteBuffer> dummyAttributes = null;
boolean writeToWal = false;
// Test UTF-8 handling
byte[] invalid = { (byte) 'f', (byte) 'o', (byte) 'o', (byte) '-', (byte) 0xfc, (byte) 0xa1,
(byte) 0xa1, (byte) 0xa1, (byte) 0xa1 };
byte[] valid = { (byte) 'f', (byte) 'o', (byte) 'o', (byte) '-', (byte) 0xE7, (byte) 0x94,
(byte) 0x9F, (byte) 0xE3, (byte) 0x83, (byte) 0x93, (byte) 0xE3, (byte) 0x83, (byte) 0xBC,
(byte) 0xE3, (byte) 0x83, (byte) 0xAB };
ArrayList<Mutation> mutations;
// non-utf8 is fine for data
mutations = new ArrayList<>(1);
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:foo")), ByteBuffer.wrap(invalid),
writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(bytes("foo")), mutations, dummyAttributes);
// this row name is valid utf8
mutations = new ArrayList<>(1);
mutations.add(
new Mutation(false, ByteBuffer.wrap(bytes("entry:foo")), ByteBuffer.wrap(valid), writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(valid), mutations, dummyAttributes);
// non-utf8 is now allowed in row names because HBase stores values as binary
mutations = new ArrayList<>(1);
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:foo")), ByteBuffer.wrap(invalid),
writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(invalid), mutations, dummyAttributes);
// Run a scanner on the rows we just created
ArrayList<ByteBuffer> columnNames = new ArrayList<>();
columnNames.add(ByteBuffer.wrap(bytes("entry:")));
System.out.println("Starting scanner...");
int scanner =
client.scannerOpen(demoTable, ByteBuffer.wrap(bytes("")), columnNames, dummyAttributes);
while (true) {
List<TRowResult> entry = client.scannerGet(scanner);
if (entry.isEmpty()) {
break;
}
printRow(entry);
}
// Run some operations on a bunch of rows
for (int i = 100; i >= 0; --i) {
// format row keys as "00000" to "00100"
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumIntegerDigits(5);
nf.setGroupingUsed(false);
byte[] row = bytes(nf.format(i));
mutations = new ArrayList<>(1);
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("unused:")),
ByteBuffer.wrap(bytes("DELETE_ME")), writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(row), mutations, dummyAttributes);
printRow(client.getRow(demoTable, ByteBuffer.wrap(row), dummyAttributes));
client.deleteAllRow(demoTable, ByteBuffer.wrap(row), dummyAttributes);
// sleep to force later timestamp
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// no-op
}
mutations = new ArrayList<>(2);
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:num")),
ByteBuffer.wrap(bytes("0")), writeToWal));
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:foo")),
ByteBuffer.wrap(bytes("FOO")), writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(row), mutations, dummyAttributes);
printRow(client.getRow(demoTable, ByteBuffer.wrap(row), dummyAttributes));
Mutation m;
mutations = new ArrayList<>(2);
m = new Mutation();
m.column = ByteBuffer.wrap(bytes("entry:foo"));
m.isDelete = true;
mutations.add(m);
m = new Mutation();
m.column = ByteBuffer.wrap(bytes("entry:num"));
m.value = ByteBuffer.wrap(bytes("-1"));
mutations.add(m);
client.mutateRow(demoTable, ByteBuffer.wrap(row), mutations, dummyAttributes);
printRow(client.getRow(demoTable, ByteBuffer.wrap(row), dummyAttributes));
mutations = new ArrayList<>();
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:num")),
ByteBuffer.wrap(bytes(Integer.toString(i))), writeToWal));
mutations.add(new Mutation(false, ByteBuffer.wrap(bytes("entry:sqr")),
ByteBuffer.wrap(bytes(Integer.toString(i * i))), writeToWal));
client.mutateRow(demoTable, ByteBuffer.wrap(row), mutations, dummyAttributes);
printRow(client.getRow(demoTable, ByteBuffer.wrap(row), dummyAttributes));
// sleep to force later timestamp
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// no-op
}
mutations.clear();
m = new Mutation();
m.column = ByteBuffer.wrap(bytes("entry:num"));
m.value = ByteBuffer.wrap(bytes("-999"));
mutations.add(m);
m = new Mutation();
m.column = ByteBuffer.wrap(bytes("entry:sqr"));
m.isDelete = true;
// shouldn't override latest
client.mutateRowTs(demoTable, ByteBuffer.wrap(row), mutations, 1, dummyAttributes);
printRow(client.getRow(demoTable, ByteBuffer.wrap(row), dummyAttributes));
List<TCell> versions = client.getVer(demoTable, ByteBuffer.wrap(row),
ByteBuffer.wrap(bytes("entry:num")), 10, dummyAttributes);
printVersions(ByteBuffer.wrap(row), versions);
if (versions.isEmpty()) {
System.out.println("FATAL: wrong # of versions");
System.exit(-1);
}
List<TCell> result = client.get(demoTable, ByteBuffer.wrap(row),
ByteBuffer.wrap(bytes("entry:foo")), dummyAttributes);
if (!result.isEmpty()) {
System.out.println("FATAL: shouldn't get here");
System.exit(-1);
}
System.out.println("");
}
// scan all rows/columnNames
columnNames.clear();
for (ColumnDescriptor col2 : client.getColumnDescriptors(demoTable).values()) {
System.out.println("column with name: " + ClientUtils.utf8(col2.name));
System.out.println(col2.toString());
columnNames.add(col2.name);
}
System.out.println("Starting scanner...");
scanner = client.scannerOpenWithStop(demoTable, ByteBuffer.wrap(bytes("00020")),
ByteBuffer.wrap(bytes("00040")), columnNames, dummyAttributes);
while (true) {
List<TRowResult> entry = client.scannerGet(scanner);
if (entry.isEmpty()) {
System.out.println("Scanner finished");
break;
}
printRow(entry);
}
transport.close();
}