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HDFS-14035. NN status discovery does not leverage delegation token. Contributed by Chen Liang.

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This commit is contained in:
Chen Liang 2018-11-14 13:32:13 -08:00 committed by Konstantin V Shvachko
parent 1a9ba9616a
commit 652b257478
16 changed files with 161 additions and 99 deletions
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13
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -93,6 +93,7 @@
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsCreateModes;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.hdfs.NameNodeProxiesClient.ProxyAndInfo;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
@ -3195,4 +3196,16 @@ public RemoteIterator<OpenFileEntry> listOpenFiles(
public void msync() throws IOException {
namenode.msync();
}
/**
* An unblocking call to get the HA service state of NameNode.
*
* @return HA state of NameNode
* @throws IOException
*/
@VisibleForTesting
public HAServiceProtocol.HAServiceState getHAServiceState()
throws IOException {
return namenode.getHAServiceState();
}
}

31
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/NameNodeProxiesClient.java
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@ -25,16 +25,13 @@
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.protocolPB.HAServiceProtocolClientSideTranslatorPB;
import org.apache.hadoop.hdfs.server.namenode.ha.ClientHAProxyFactory;
import org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory;
import org.apache.hadoop.ipc.AlignmentContext;
import org.apache.hadoop.ipc.Client;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -352,34 +349,6 @@ public static ClientProtocol createNonHAProxyWithClientProtocol(
fallbackToSimpleAuth, null);
}
/**
* Creates a non-HA proxy object with {@link HAServiceProtocol} to the
* given NameNode address, using the provided configuration. The proxy will
* use the RPC timeout configuration specified via {@link
* org.apache.hadoop.fs.CommonConfigurationKeys#IPC_CLIENT_RPC_TIMEOUT_KEY}.
* Upon failures, this will retry up to certain times with {@link RetryProxy}.
*
* @param address the NameNode address
* @param conf the configuration to be used
* @return a non-HA proxy with {@link HAServiceProtocol}.
*/
public static HAServiceProtocol createNonHAProxyWithHAServiceProtocol(
InetSocketAddress address, Configuration conf) throws IOException {
RetryPolicy timeoutPolicy = RetryPolicies.exponentialBackoffRetry(
MAX_RETRIES, DELAY_MILLISECONDS, TimeUnit.MILLISECONDS);
HAServiceProtocol proxy =
new HAServiceProtocolClientSideTranslatorPB(
address, conf, NetUtils.getDefaultSocketFactory(conf),
Client.getRpcTimeout(conf));
return (HAServiceProtocol) RetryProxy.create(
HAServiceProtocol.class,
new DefaultFailoverProxyProvider<>(HAServiceProtocol.class, proxy),
new HashMap<>(),
timeoutPolicy
);
}
public static ClientProtocol createProxyWithAlignmentContext(
InetSocketAddress address, Configuration conf, UserGroupInformation ugi,
boolean withRetries, AtomicBoolean fallbackToSimpleAuth,

13
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/ClientProtocol.java
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@ -27,6 +27,7 @@
import org.apache.hadoop.crypto.CryptoProtocolVersion;
import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
import org.apache.hadoop.fs.PathIsNotEmptyDirectoryException;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.fs.CacheFlag;
import org.apache.hadoop.fs.ContentSummary;
@ -1634,7 +1635,7 @@ List<XAttr> listXAttrs(String src)
* @throws IOException see specific implementation
*/
@Idempotent
@ReadOnly // TODO : after HDFS-13749 is done, change to coordinated call
@ReadOnly(isCoordinated = true)
void checkAccess(String path, FsAction mode) throws IOException;
/**
@ -1788,6 +1789,16 @@ AddErasureCodingPolicyResponse[] addErasureCodingPolicies(
BatchedEntries<OpenFileEntry> listOpenFiles(long prevId,
EnumSet<OpenFilesType> openFilesTypes, String path) throws IOException;
/**
* Get HA service state of the server.
*
* @return server HA state
* @throws IOException
*/
@Idempotent
@ReadOnly
HAServiceProtocol.HAServiceState getHAServiceState() throws IOException;
/**
* Called by client to wait until the server has reached the state id of the
* client. The client and server state id are given by client side and server

28
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolTranslatorPB.java
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@ -48,6 +48,8 @@
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HAServiceStateProto;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.hdfs.inotify.EventBatchList;
import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
@ -146,6 +148,7 @@
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePoliciesRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePoliciesResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePolicyRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.HAServiceStateRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.IsFileClosedRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCacheDirectivesRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCacheDirectivesResponseProto;
@ -1968,4 +1971,29 @@ public void satisfyStoragePolicy(String src) throws IOException {
throw ProtobufHelper.getRemoteException(e);
}
}
@Override
public HAServiceProtocol.HAServiceState getHAServiceState()
throws IOException {
HAServiceStateRequestProto req =
HAServiceStateRequestProto.newBuilder().build();
try {
HAServiceStateProto res =
rpcProxy.getHAServiceState(null, req).getState();
switch(res) {
case ACTIVE:
return HAServiceProtocol.HAServiceState.ACTIVE;
case STANDBY:
return HAServiceProtocol.HAServiceState.STANDBY;
case OBSERVER:
return HAServiceProtocol.HAServiceState.OBSERVER;
case INITIALIZING:
default:
return HAServiceProtocol.HAServiceState.INITIALIZING;
}
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
}
}

33
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.java
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@ -28,14 +28,11 @@
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
import org.apache.hadoop.hdfs.DFSUtilClient;
import org.apache.hadoop.hdfs.HAUtilClient;
import org.apache.hadoop.hdfs.NameNodeProxiesClient;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.io.retry.FailoverProxyProvider;
import org.apache.hadoop.security.UserGroupInformation;
@ -122,44 +119,22 @@ public static class NNProxyInfo<T> extends ProxyInfo<T> {
*/
private HAServiceState cachedState;
/** Proxy for getting HA service status from the given NameNode. */
private HAServiceProtocol serviceProxy;
public NNProxyInfo(InetSocketAddress address, Configuration conf) {
public NNProxyInfo(InetSocketAddress address) {
super(null, address.toString());
this.address = address;
try {
serviceProxy = NameNodeProxiesClient
.createNonHAProxyWithHAServiceProtocol(address, conf);
} catch (IOException ioe) {
LOG.error("Failed to create HAServiceProtocol proxy to NameNode" +
" at {}", address, ioe);
throw new RuntimeException(ioe);
}
}
public InetSocketAddress getAddress() {
return address;
}
public void refreshCachedState() {
try {
cachedState = serviceProxy.getServiceStatus().getState();
} catch (IOException e) {
LOG.warn("Failed to connect to {}. Setting cached state to Standby",
address, e);
cachedState = HAServiceState.STANDBY;
}
public void setCachedState(HAServiceState state) {
cachedState = state;
}
public HAServiceState getCachedState() {
return cachedState;
}
@VisibleForTesting
public void setServiceProxyForTesting(HAServiceProtocol proxy) {
this.serviceProxy = proxy;
}
}
@Override
@ -202,7 +177,7 @@ protected List<NNProxyInfo<T>> getProxyAddresses(URI uri, String addressKey) {
Collection<InetSocketAddress> addressesOfNns = addressesInNN.values();
for (InetSocketAddress address : addressesOfNns) {
proxies.add(new NNProxyInfo<T>(address, conf));
proxies.add(new NNProxyInfo<T>(address));
}
// Randomize the list to prevent all clients pointing to the same one
boolean randomized = getRandomOrder(conf, uri);

2
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.java
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@ -48,7 +48,7 @@ public class IPFailoverProxyProvider<T> extends
public IPFailoverProxyProvider(Configuration conf, URI uri,
Class<T> xface, HAProxyFactory<T> factory) {
super(conf, uri, xface, factory);
this.nnProxyInfo = new NNProxyInfo<>(DFSUtilClient.getNNAddress(uri), conf);
this.nnProxyInfo = new NNProxyInfo<>(DFSUtilClient.getNNAddress(uri));
}
@Override

9
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/ObserverReadProxyProvider.java
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@ -211,7 +211,14 @@ private synchronized void changeProxy(NNProxyInfo<T> initial) {
currentProxy = null;
currentIndex = (currentIndex + 1) % nameNodeProxies.size();
currentProxy = createProxyIfNeeded(nameNodeProxies.get(currentIndex));
currentProxy.refreshCachedState();
try {
HAServiceState state = currentProxy.proxy.getHAServiceState();
currentProxy.setCachedState(state);
} catch (IOException e) {
LOG.info("Failed to connect to {}. Setting cached state to Standby",
currentProxy.getAddress(), e);
currentProxy.setCachedState(HAServiceState.STANDBY);
}
LOG.debug("Changed current proxy from {} to {}",
initial == null ? "none" : initial.proxyInfo,
currentProxy.proxyInfo);

10
hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.proto
View File

@ -35,6 +35,7 @@ import "xattr.proto";
import "encryption.proto";
import "inotify.proto";
import "erasurecoding.proto";
import "HAServiceProtocol.proto";
/**
* The ClientNamenodeProtocol Service defines the interface between a client
@ -844,6 +845,13 @@ message SatisfyStoragePolicyResponseProto {
}
message HAServiceStateRequestProto {
}
message HAServiceStateResponseProto {
required hadoop.common.HAServiceStateProto state = 1;
}
service ClientNamenodeProtocol {
rpc getBlockLocations(GetBlockLocationsRequestProto)
returns(GetBlockLocationsResponseProto);
@ -1034,4 +1042,6 @@ service ClientNamenodeProtocol {
returns(MsyncResponseProto);
rpc satisfyStoragePolicy(SatisfyStoragePolicyRequestProto)
returns(SatisfyStoragePolicyResponseProto);
rpc getHAServiceState(HAServiceStateRequestProto)
returns(HAServiceStateResponseProto);
}

3
hadoop-hdfs-project/hadoop-hdfs-client/src/test/java/org/apache/hadoop/hdfs/protocol/TestReadOnly.java
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@ -72,7 +72,8 @@ public class TestReadOnly {
"getCurrentEditLogTxid",
"getEditsFromTxid",
"getQuotaUsage",
"msync"
"msync",
"getHAServiceState"
)
);

1
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/proto/CMakeLists.txt
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@ -34,6 +34,7 @@ protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS
${PROTO_HADOOP_DIR}/ProtobufRpcEngine.proto
${PROTO_HADOOP_DIR}/RpcHeader.proto
${PROTO_HADOOP_DIR}/Security.proto
${PROTO_HADOOP_DIR}/HAServiceProtocol.proto
)
add_executable(protoc-gen-hrpc protoc_gen_hrpc.cc)

8
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java
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@ -34,6 +34,7 @@
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSUtil;
@ -1542,6 +1543,13 @@ public void satisfyStoragePolicy(String path) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, false);
}
@Override
public HAServiceProtocol.HAServiceState getHAServiceState()
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
/**
* Determines combinations of eligible src/dst locations for a rename. A
* rename cannot change the namespace. Renames are only allowed if there is an

7
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
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@ -58,6 +58,7 @@
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.inotify.EventBatchList;
@ -1187,6 +1188,12 @@ public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId)
return clientProto.listOpenFiles(prevId);
}
@Override // ClientProtocol
public HAServiceProtocol.HAServiceState getHAServiceState()
throws IOException {
return clientProto.getHAServiceState();
}
@Override // ClientProtocol
public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId,
EnumSet<OpenFilesType> openFilesTypes, String path) throws IOException {

36
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolServerSideTranslatorPB.java
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@ -30,6 +30,9 @@
import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
import org.apache.hadoop.fs.permission.FsCreateModes;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.proto.HAServiceProtocolProtos;
import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HAServiceStateProto;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
@ -155,6 +158,8 @@
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePoliciesResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePolicyRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetStoragePolicyResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.HAServiceStateRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.HAServiceStateResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.IsFileClosedRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.IsFileClosedResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.UpgradeStatusRequestProto;
@ -1917,4 +1922,35 @@ public SatisfyStoragePolicyResponseProto satisfyStoragePolicy(
}
return VOID_SATISFYSTORAGEPOLICY_RESPONSE;
}
@Override
public HAServiceStateResponseProto getHAServiceState(
RpcController controller,
HAServiceStateRequestProto request) throws ServiceException {
try {
HAServiceProtocol.HAServiceState state = server.getHAServiceState();
HAServiceStateProto retState;
switch (state) {
case ACTIVE:
retState = HAServiceProtocolProtos.HAServiceStateProto.ACTIVE;
break;
case STANDBY:
retState = HAServiceProtocolProtos.HAServiceStateProto.STANDBY;
break;
case OBSERVER:
retState = HAServiceProtocolProtos.HAServiceStateProto.OBSERVER;
break;
case INITIALIZING:
default:
retState = HAServiceProtocolProtos.HAServiceStateProto.INITIALIZING;
break;
}
HAServiceStateResponseProto.Builder builder =
HAServiceStateResponseProto.newBuilder();
builder.setState(retState);
return builder.build();
} catch (IOException e) {
throw new ServiceException(e);
}
}
}

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
View File

@ -1385,6 +1385,12 @@ public void msync() throws IOException {
// TODO : need to be filled up if needed. May be a no-op here.
}
@Override // ClientProtocol
public HAServiceState getHAServiceState() throws IOException {
checkNNStartup();
return nn.getServiceStatus().getState();
}
@Override // ClientProtocol
public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie)
throws IOException {

3
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestConsistentReadsObserver.java
View File

@ -89,6 +89,9 @@ public void testMsyncSimple() throws Exception {
// 0 == not completed, 1 == succeeded, -1 == failed
AtomicInteger readStatus = new AtomicInteger(0);
// Making an uncoordinated call, which initialize the proxy
// to Observer node.
dfs.getClient().getHAServiceState();
dfs.mkdir(testPath, FsPermission.getDefault());
assertSentTo(0);

57
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverReadProxyProvider.java
View File

@ -27,8 +27,6 @@
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.ha.HAServiceStatus;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
@ -47,7 +45,6 @@
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
/**
* Tests for {@link ObserverReadProxyProvider} under various configurations of
@ -79,8 +76,6 @@ private void setupProxyProvider(int namenodeCount) throws Exception {
namenodeAnswers = new NameNodeAnswer[namenodeCount];
ClientProtocol[] proxies = new ClientProtocol[namenodeCount];
Map<String, ClientProtocol> proxyMap = new HashMap<>();
HAServiceProtocol[] serviceProxies = new HAServiceProtocol[namenodeCount];
Map<String, HAServiceProtocol> serviceProxyMap = new HashMap<>();
for (int i = 0; i < namenodeCount; i++) {
namenodeIDs[i] = "nn" + i;
namenodeAddrs[i] = "namenode" + i + ".test:8020";
@ -92,11 +87,9 @@ private void setupProxyProvider(int namenodeCount) throws Exception {
.when(proxies[i]));
doRead(Mockito.doAnswer(namenodeAnswers[i].clientAnswer)
.when(proxies[i]));
serviceProxies[i] = mock(HAServiceProtocol.class);
Mockito.doAnswer(namenodeAnswers[i].serviceAnswer)
.when(serviceProxies[i]).getServiceStatus();
Mockito.doAnswer(namenodeAnswers[i].clientAnswer)
.when(proxies[i]).getHAServiceState();
proxyMap.put(namenodeAddrs[i], proxies[i]);
serviceProxyMap.put(namenodeAddrs[i], serviceProxies[i]);
}
conf.set(HdfsClientConfigKeys.DFS_HA_NAMENODES_KEY_PREFIX + "." + ns,
Joiner.on(",").join(namenodeIDs));
@ -116,10 +109,6 @@ protected List<NNProxyInfo<ClientProtocol>> getProxyAddresses(
URI uri, String addressKey) {
List<NNProxyInfo<ClientProtocol>> nnProxies =
super.getProxyAddresses(uri, addressKey);
for (NNProxyInfo<ClientProtocol> nnProxy : nnProxies) {
String addressStr = nnProxy.getAddress().toString();
nnProxy.setServiceProxyForTesting(serviceProxyMap.get(addressStr));
}
return nnProxies;
}
};
@ -322,8 +311,8 @@ private static void doRead(ClientProtocol client) throws Exception {
}
/**
* An {@link Answer} used for mocking of {@link ClientProtocol} and
* {@link HAServiceProtocol}. Setting the state or unreachability of this
* An {@link Answer} used for mocking of {@link ClientProtocol}.
* Setting the state or unreachability of this
* Answer will make the linked ClientProtocol respond as if it was
* communicating with a NameNode of the corresponding state. It is in Standby
* state by default.
@ -338,31 +327,29 @@ private static class NameNodeAnswer {
private volatile boolean allowReads = false;
private ClientProtocolAnswer clientAnswer = new ClientProtocolAnswer();
private HAServiceProtocolAnswer serviceAnswer =
new HAServiceProtocolAnswer();
private class HAServiceProtocolAnswer implements Answer<HAServiceStatus> {
private class ClientProtocolAnswer implements Answer<Object> {
@Override
public HAServiceStatus answer(InvocationOnMock invocation)
throws Throwable {
HAServiceStatus status = mock(HAServiceStatus.class);
if (allowReads && allowWrites) {
when(status.getState()).thenReturn(HAServiceState.ACTIVE);
} else if (allowReads) {
when(status.getState()).thenReturn(HAServiceState.OBSERVER);
} else {
when(status.getState()).thenReturn(HAServiceState.STANDBY);
}
return status;
}
}
private class ClientProtocolAnswer implements Answer<Void> {
@Override
public Void answer(InvocationOnMock invocationOnMock) throws Throwable {
public Object answer(InvocationOnMock invocationOnMock) throws Throwable {
if (unreachable) {
throw new IOException("Unavailable");
}
// retryActive should be checked before getHAServiceState.
// Check getHAServiceState first here only because in test,
// it relies read call, which relies on getHAServiceState
// to have passed already. May revisit future.
if (invocationOnMock.getMethod()
.getName().equals("getHAServiceState")) {
HAServiceState status;
if (allowReads && allowWrites) {
status = HAServiceState.ACTIVE;
} else if (allowReads) {
status = HAServiceState.OBSERVER;
} else {
status = HAServiceState.STANDBY;
}
return status;
}
if (retryActive) {
throw new RemoteException(
ObserverRetryOnActiveException.class.getCanonicalName(),