/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.ipc;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.lang.reflect.Method;
import junit.framework.TestCase;
import java.util.Arrays;
import org.apache.commons.logging.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.UTF8;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.ipc.VersionedProtocol;
/** Unit tests for RPC. */
public class TestRPC extends TestCase {
private static final int PORT = 1234;
private static final String ADDRESS = "0.0.0.0";
public static final Log LOG =
LogFactory.getLog("org.apache.hadoop.ipc.TestRPC");
private static Configuration conf = new Configuration();
public TestRPC(String name) { super(name); }
public interface TestProtocol extends VersionedProtocol {
public static final long versionID = 1L;
void ping() throws IOException;
String echo(String value) throws IOException;
String[] echo(String[] value) throws IOException;
Writable echo(Writable value) throws IOException;
int add(int v1, int v2) throws IOException;
int add(int[] values) throws IOException;
int error() throws IOException;
void testServerGet() throws IOException;
}
public class TestImpl implements TestProtocol {
public long getProtocolVersion(String protocol, long clientVersion) {
return TestProtocol.versionID;
}
public void ping() {}
public String echo(String value) throws IOException { return value; }
public String[] echo(String[] values) throws IOException { return values; }
public Writable echo(Writable writable) {
return writable;
}
public int add(int v1, int v2) {
return v1 + v2;
}
public int add(int[] values) {
int sum = 0;
for (int i = 0; i < values.length; i++) {
sum += values[i];
}
return sum;
}
public int error() throws IOException {
throw new IOException("bobo");
}
public void testServerGet() throws IOException {
if (!(Server.get() instanceof RPC.Server)) {
throw new IOException("Server.get() failed");
}
}
}
public void testCalls() throws Exception {
Server server = RPC.getServer(new TestImpl(), ADDRESS, PORT, conf);
server.start();
InetSocketAddress addr = new InetSocketAddress(PORT);
TestProtocol proxy =
(TestProtocol)RPC.getProxy(TestProtocol.class, TestProtocol.versionID, addr, conf);
proxy.ping();
String stringResult = proxy.echo("foo");
assertEquals(stringResult, "foo");
stringResult = proxy.echo((String)null);
assertEquals(stringResult, null);
String[] stringResults = proxy.echo(new String[]{"foo","bar"});
assertTrue(Arrays.equals(stringResults, new String[]{"foo","bar"}));
stringResults = proxy.echo((String[])null);
assertTrue(Arrays.equals(stringResults, null));
UTF8 utf8Result = (UTF8)proxy.echo(new UTF8("hello world"));
assertEquals(utf8Result, new UTF8("hello world"));
utf8Result = (UTF8)proxy.echo((UTF8)null);
assertEquals(utf8Result, null);
int intResult = proxy.add(1, 2);
assertEquals(intResult, 3);
intResult = proxy.add(new int[] {1, 2});
assertEquals(intResult, 3);
boolean caught = false;
try {
proxy.error();
} catch (IOException e) {
LOG.debug("Caught " + e);
caught = true;
}
assertTrue(caught);
proxy.testServerGet();
// try some multi-calls
Method echo =
TestProtocol.class.getMethod("echo", new Class[] { String.class });
String[] strings = (String[])RPC.call(echo, new String[][]{{"a"},{"b"}},
new InetSocketAddress[] {addr, addr}, conf);
assertTrue(Arrays.equals(strings, new String[]{"a","b"}));
Method ping = TestProtocol.class.getMethod("ping", new Class[] {});
Object[] voids = (Object[])RPC.call(ping, new Object[][]{{},{}},
new InetSocketAddress[] {addr, addr}, conf);
assertEquals(voids, null);
server.stop();
}
public static void main(String[] args) throws Exception {
new TestRPC("test").testCalls();
}
}