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feat: support resolving meta host through DNS (#60)
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40 changes: 40 additions & 0 deletions
40
src/main/java/com/xiaomi/infra/pegasus/rpc/async/HostNameResolver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| // Copyright (c) 2019, Xiaomi, Inc. All rights reserved. | ||
| // This source code is licensed under the Apache License Version 2.0, which | ||
| // can be found in the LICENSE file in the root directory of this source tree. | ||
| package com.xiaomi.infra.pegasus.rpc.async; | ||
|
|
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| import com.xiaomi.infra.pegasus.base.rpc_address; | ||
| import java.net.InetAddress; | ||
| import java.net.UnknownHostException; | ||
| import java.nio.ByteBuffer; | ||
| import java.nio.ByteOrder; | ||
|
|
||
| /* | ||
| * Resolves host:port into a set of ip addresses. | ||
| * The intention of this class is to mock DNS. | ||
| */ | ||
| public class HostNameResolver { | ||
|
|
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| public rpc_address[] resolve(String hostPort) throws IllegalArgumentException { | ||
| String[] pairs = hostPort.split(":"); | ||
| if (pairs.length != 2) { | ||
| throw new IllegalArgumentException("Meta server host name format error!"); | ||
| } | ||
|
|
||
| try { | ||
| Integer port = Integer.valueOf(pairs[1]); | ||
| InetAddress[] resolvedAddresses = InetAddress.getAllByName(pairs[0]); | ||
| rpc_address[] results = new rpc_address[resolvedAddresses.length]; | ||
| int size = 0; | ||
| for (InetAddress addr : resolvedAddresses) { | ||
| rpc_address rpcAddr = new rpc_address(); | ||
| int ip = ByteBuffer.wrap(addr.getAddress()).order(ByteOrder.BIG_ENDIAN).getInt(); | ||
| rpcAddr.address = ((long) ip << 32) + ((long) port << 16) + 1; | ||
| results[size++] = rpcAddr; | ||
| } | ||
| return results; | ||
| } catch (UnknownHostException e) { | ||
| return null; | ||
| } | ||
| } | ||
| } |
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44 changes: 44 additions & 0 deletions
44
src/test/java/com/xiaomi/infra/pegasus/base/TestRpcAddress.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| // Copyright (c) 2019, Xiaomi, Inc. All rights reserved. | ||
| // This source code is licensed under the Apache License Version 2.0, which | ||
| // can be found in the LICENSE file in the root directory of this source tree. | ||
|
|
||
| package com.xiaomi.infra.pegasus.base; | ||
|
|
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| import com.xiaomi.infra.pegasus.rpc.async.HostNameResolver; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
|
|
||
| public class TestRpcAddress { | ||
| @Test | ||
| public void testResolveFromHostPort() throws Exception { | ||
| HostNameResolver hostNameResolver = new HostNameResolver(); | ||
| rpc_address[] addrs = hostNameResolver.resolve("127.0.0.1:34601"); | ||
|
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| Assert.assertNotNull(addrs); | ||
| Assert.assertEquals(addrs.length, 1); | ||
| Assert.assertEquals(addrs[0].get_ip(), "127.0.0.1"); | ||
| Assert.assertEquals(addrs[0].get_port(), 34601); | ||
|
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| addrs = hostNameResolver.resolve("www.baidu.com:80"); | ||
| Assert.assertNotNull(addrs); | ||
| Assert.assertTrue(addrs.length >= 1); | ||
|
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| addrs = hostNameResolver.resolve("abcabcabcabc:34601"); | ||
| Assert.assertNull(addrs); | ||
|
|
||
| try { | ||
| addrs = hostNameResolver.resolve("localhost"); | ||
| } catch (IllegalArgumentException e) { | ||
| e.printStackTrace(); | ||
| Assert.assertNull(addrs); | ||
| } | ||
| } | ||
|
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||
| @Test | ||
| public void testFromString() throws Exception { | ||
| rpc_address addr = new rpc_address(); | ||
| Assert.assertTrue(addr.fromString("127.0.0.1:34601")); | ||
| Assert.assertEquals(addr.get_ip(), "127.0.0.1"); | ||
| Assert.assertEquals(addr.get_port(), 34601); | ||
| } | ||
| } |
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