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simplynaveen20 wants to merge 9 commits into from
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Making databaseAccount read dynamic #7831

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8984f68
Making databaseAccount read dynamic
simplynaveen20 Jan 29, 2020
b8b7767
moving gatewayReader to async apis
simplynaveen20 Feb 4, 2020
b7fc0f2
megre with feature 4
simplynaveen20 Feb 4, 2020
b1fdde2
merge with feature V4
simplynaveen20 Feb 4, 2020
3bd9401
fixing test case
simplynaveen20 Feb 4, 2020
9ad648c
test case fix
simplynaveen20 Feb 5, 2020
42dbe0f
fixing test case around token resolver
simplynaveen20 Feb 5, 2020
6081652
resolving merge conflict
simplynaveen20 Feb 13, 2020
9678f9b
merge with featureV4
simplynaveen20 Feb 13, 2020
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40 changes: 33 additions & 7 deletions ...mos/azure-cosmos/src/main/java/com/azure/cosmos/implementation/GlobalEndpointManager.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,26 +3,28 @@

package com.azure.cosmos.implementation;

import com.azure.cosmos.implementation.routing.LocationCache;
import com.azure.cosmos.implementation.routing.LocationHelper;
import com.azure.cosmos.BridgeInternal;
import com.azure.cosmos.ConnectionPolicy;
import com.azure.cosmos.DatabaseAccount;
import com.azure.cosmos.implementation.caches.AsyncCache;
import com.azure.cosmos.implementation.routing.LocationCache;
import com.azure.cosmos.implementation.routing.LocationHelper;
import org.apache.commons.collections4.list.UnmodifiableList;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;

import java.net.URISyntaxException;
import java.net.URI;
import java.time.Duration;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;
Expand All @@ -45,6 +47,8 @@ public class GlobalEndpointManager implements AutoCloseable {
private final ExecutorService executor = Executors.newSingleThreadExecutor();
private final Scheduler scheduler = Schedulers.fromExecutor(executor);
private volatile boolean isClosed;
private final AsyncCache<String, DatabaseAccount> databaseAccountAsyncCache;
private AtomicBoolean firstTimeDatabaseAccountInitialization = new AtomicBoolean(true);

public GlobalEndpointManager(DatabaseAccountManagerInternal owner, ConnectionPolicy connectionPolicy, Configs configs) {
this.backgroundRefreshLocationTimeIntervalInMS = configs.getUnavailableLocationsExpirationTimeInSeconds() * 1000;
Expand All @@ -69,6 +73,7 @@ public GlobalEndpointManager(DatabaseAccountManagerInternal owner, ConnectionPol
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
databaseAccountAsyncCache = new AsyncCache<>();
}

public void init() {
Expand All @@ -87,7 +92,7 @@ public UnmodifiableList<URI> getWriteEndpoints() {
return this.locationCache.getWriteEndpoints();
}

public static Mono<DatabaseAccount> getDatabaseAccountFromAnyLocationsAsync(
public Mono<DatabaseAccount> getDatabaseAccountFromAnyLocationsAsync(
URI defaultEndpoint, List<String> locations, Function<URI, Mono<DatabaseAccount>> getDatabaseAccountFn) {

return getDatabaseAccountFn.apply(defaultEndpoint).onErrorResume(
Expand Down Expand Up @@ -159,6 +164,12 @@ public Mono<Void> refreshLocationAsync(DatabaseAccount databaseAccount, boolean
});
}

public Mono<DatabaseAccount> getDatabaseAccountFromCache(URI defaultEndpoint) {
return this.databaseAccountAsyncCache.getAsync(StringUtils.EMPTY, null, () -> this.owner.getDatabaseAccountFromEndpoint(defaultEndpoint).single().doOnSuccess(databaseAccount -> {
this.refreshLocationAsync(databaseAccount, false);
}));
}

private Mono<Void> refreshLocationPrivateAsync(DatabaseAccount databaseAccount) {
return Mono.defer(() -> {
logger.debug("refreshLocationPrivateAsync() refreshing locations");
Expand Down Expand Up @@ -236,7 +247,7 @@ private Mono<Void> startRefreshLocationTimerAsync(boolean initialization) {
}

logger.debug("startRefreshLocationTimerAsync() - Invoking refresh, I was registered on [{}]", now);
Mono<DatabaseAccount> databaseAccountObs = GlobalEndpointManager.getDatabaseAccountFromAnyLocationsAsync(this.defaultEndpoint, new ArrayList<>(this.connectionPolicy.getPreferredLocations()),
Mono<DatabaseAccount> databaseAccountObs = this.getDatabaseAccountFromAnyLocationsAsync(this.defaultEndpoint, new ArrayList<>(this.connectionPolicy.getPreferredLocations()),
this::getDatabaseAccountAsync);

return databaseAccountObs.flatMap(dbAccount -> {
Expand All @@ -253,8 +264,23 @@ private Mono<Void> startRefreshLocationTimerAsync(boolean initialization) {
}

private Mono<DatabaseAccount> getDatabaseAccountAsync(URI serviceEndpoint) {
return this.owner.getDatabaseAccountFromEndpoint(serviceEndpoint)
.doOnNext(i -> logger.debug("account retrieved: {}", i)).single();
final GlobalEndpointManager that = this;
Callable<Mono<DatabaseAccount>> fetchDatabaseAccount = () -> {
return that.owner.getDatabaseAccountFromEndpoint(serviceEndpoint).doOnNext(i -> {
logger.debug("account retrieved: {}", i);
}).single();
};

Mono<DatabaseAccount> obsoleteValueMono = databaseAccountAsyncCache.getAsync(StringUtils.EMPTY, null, fetchDatabaseAccount);
return obsoleteValueMono.flatMap(obsoleteValue -> {
if (firstTimeDatabaseAccountInitialization.compareAndSet(true, false)) {
return Mono.just(obsoleteValue);
}
return databaseAccountAsyncCache.getAsync(StringUtils.EMPTY, obsoleteValue, fetchDatabaseAccount).doOnError(t -> {
//Putting back the old value in cache, this will avoid cache corruption
databaseAccountAsyncCache.set(StringUtils.EMPTY, obsoleteValue);
});
});
}

public boolean isClosed() {
Expand Down
21 changes: 2 additions & 19 deletions ...smos/azure-cosmos/src/main/java/com/azure/cosmos/implementation/RxDocumentClientImpl.java
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Expand Up @@ -228,29 +228,12 @@ private RxDocumentClientImpl(URI serviceEndpoint,
}

private void initializeGatewayConfigurationReader() {
String resourceToken;
if(this.tokenResolver != null) {
resourceToken = this.tokenResolver.getAuthorizationToken("GET", "", CosmosResourceType.System, null);
} else if(!this.hasAuthKeyResourceToken && this.authorizationTokenProvider == null) {
resourceToken = this.firstResourceTokenFromPermissionFeed;
} else {
assert this.masterKeyOrResourceToken != null || this.cosmosKeyCredential != null;
resourceToken = this.masterKeyOrResourceToken;
}

this.gatewayConfigurationReader = new GatewayServiceConfigurationReader(this.serviceEndpoint,
this.hasAuthKeyResourceToken,
resourceToken,
this.connectionPolicy,
this.authorizationTokenProvider,
this.reactorHttpClient);

DatabaseAccount databaseAccount = this.gatewayConfigurationReader.initializeReaderAsync().block();
this.gatewayConfigurationReader = new GatewayServiceConfigurationReader(this.serviceEndpoint, this.globalEndpointManager);
DatabaseAccount databaseAccount = this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
this.useMultipleWriteLocations = this.connectionPolicy.getUsingMultipleWriteLocations() && BridgeInternal.isEnableMultipleWriteLocations(databaseAccount);

// TODO: add support for openAsync
// https://msdata.visualstudio.com/CosmosDB/_workitems/edit/332589
this.globalEndpointManager.refreshLocationAsync(databaseAccount, false).block();
}

public void init() {
Expand Down
114 changes: 14 additions & 100 deletions ...com/azure/cosmos/implementation/directconnectivity/GatewayServiceConfigurationReader.java
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Expand Up @@ -6,6 +6,8 @@
import com.azure.cosmos.BridgeInternal;
import com.azure.cosmos.ConnectionPolicy;
import com.azure.cosmos.ConsistencyLevel;
import com.azure.cosmos.CosmosClientException;
import com.azure.cosmos.CosmosError;
import com.azure.cosmos.implementation.BaseAuthorizationTokenProvider;
import com.azure.cosmos.implementation.Constants;
import com.azure.cosmos.DatabaseAccount;
Expand All @@ -21,9 +23,7 @@
import io.netty.handler.codec.http.HttpMethod;
import reactor.core.publisher.Mono;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
Expand All @@ -41,118 +41,32 @@
*/
public class GatewayServiceConfigurationReader {

public static final String GATEWAY_READER_NOT_INITIALIZED = "GatewayServiceConfigurationReader has not been initialized";

public ReplicationPolicy userReplicationPolicy;
private ReplicationPolicy systemReplicationPolicy;
private ConsistencyLevel consistencyLevel;
private volatile boolean initialized;
private URI serviceEndpoint;
private final ConnectionPolicy connectionPolicy;
private Map<String, Object> queryEngineConfiguration;
private final BaseAuthorizationTokenProvider baseAuthorizationTokenProvider;
private final boolean hasAuthKeyResourceToken;
private final String authKeyResourceToken;
private HttpClient httpClient;
private GlobalEndpointManager globalEndpointManager;

public GatewayServiceConfigurationReader(URI serviceEndpoint, boolean hasResourceToken, String resourceToken,
ConnectionPolicy connectionPolicy, BaseAuthorizationTokenProvider baseAuthorizationTokenProvider,
HttpClient httpClient) {
public GatewayServiceConfigurationReader(URI serviceEndpoint, GlobalEndpointManager globalEndpointManager) {
this.serviceEndpoint = serviceEndpoint;
this.baseAuthorizationTokenProvider = baseAuthorizationTokenProvider;
this.hasAuthKeyResourceToken = hasResourceToken;
this.authKeyResourceToken = resourceToken;
this.connectionPolicy = connectionPolicy;
this.httpClient = httpClient;
this.globalEndpointManager = globalEndpointManager;
this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
}

public ReplicationPolicy getUserReplicationPolicy() {
this.throwIfNotInitialized();
return this.userReplicationPolicy;
DatabaseAccount databaseAccount = this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
return BridgeInternal.getReplicationPolicy(databaseAccount);
}

public ReplicationPolicy getSystemReplicationPolicy() {
this.throwIfNotInitialized();
return this.systemReplicationPolicy;
}

public boolean enableAuthorization() {
return true;
DatabaseAccount databaseAccount = this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
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return BridgeInternal.getSystemReplicationPolicy(databaseAccount);
}

public ConsistencyLevel getDefaultConsistencyLevel() {
this.throwIfNotInitialized();
return this.consistencyLevel;
}

public void setDefaultConsistencyLevel(ConsistencyLevel value) {
this.throwIfNotInitialized();
this.consistencyLevel = value;
DatabaseAccount databaseAccount = this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
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return BridgeInternal.getConsistencyPolicy(databaseAccount).getDefaultConsistencyLevel();
}

public Map<String, Object> getQueryEngineConfiguration() {
this.throwIfNotInitialized();
return this.queryEngineConfiguration;
}

private Mono<DatabaseAccount> getDatabaseAccountAsync(URI serviceEndpoint) {

HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.set(HttpConstants.HttpHeaders.VERSION, HttpConstants.Versions.CURRENT_VERSION);

UserAgentContainer userAgentContainer = new UserAgentContainer();
String userAgentSuffix = this.connectionPolicy.getUserAgentSuffix();
if (userAgentSuffix != null && userAgentSuffix.length() > 0) {
userAgentContainer.setSuffix(userAgentSuffix);
}

httpHeaders.set(HttpConstants.HttpHeaders.USER_AGENT, userAgentContainer.getUserAgent());
httpHeaders.set(HttpConstants.HttpHeaders.API_TYPE, Constants.Properties.SQL_API_TYPE);

String xDate = Utils.nowAsRFC1123();
httpHeaders.set(HttpConstants.HttpHeaders.X_DATE, xDate);

String authorizationToken;
if (this.hasAuthKeyResourceToken || baseAuthorizationTokenProvider == null) {
authorizationToken = HttpUtils.urlEncode(this.authKeyResourceToken);
} else {
// Retrieve the document service properties.
Map<String, String> header = new HashMap<>();
header.put(HttpConstants.HttpHeaders.X_DATE, xDate);
authorizationToken = baseAuthorizationTokenProvider
.generateKeyAuthorizationSignature(HttpConstants.HttpMethods.GET, serviceEndpoint, header);
}
httpHeaders.set(HttpConstants.HttpHeaders.AUTHORIZATION, authorizationToken);

HttpRequest httpRequest = new HttpRequest(HttpMethod.GET, serviceEndpoint, serviceEndpoint.getPort(), httpHeaders);
Mono<HttpResponse> httpResponse = httpClient.send(httpRequest);
return toDatabaseAccountObservable(httpResponse, httpRequest);
}

public Mono<DatabaseAccount> initializeReaderAsync() {
return GlobalEndpointManager.getDatabaseAccountFromAnyLocationsAsync(this.serviceEndpoint,

new ArrayList<>(this.connectionPolicy.getPreferredLocations()), url -> {
return getDatabaseAccountAsync(url);

}).doOnSuccess(databaseAccount -> {
userReplicationPolicy = BridgeInternal.getReplicationPolicy(databaseAccount);
systemReplicationPolicy = BridgeInternal.getSystemReplicationPolicy(databaseAccount);
queryEngineConfiguration = BridgeInternal.getQueryEngineConfiuration(databaseAccount);
consistencyLevel = BridgeInternal.getConsistencyPolicy(databaseAccount).getDefaultConsistencyLevel();
initialized = true;
});
}

private Mono<DatabaseAccount> toDatabaseAccountObservable(Mono<HttpResponse> httpResponse, HttpRequest httpRequest) {

return HttpClientUtils.parseResponseAsync(httpResponse, httpRequest)
.map(rxDocumentServiceResponse -> rxDocumentServiceResponse.getResource(DatabaseAccount.class));
}

private void throwIfNotInitialized() {
if (!this.initialized) {
throw new IllegalArgumentException(GATEWAY_READER_NOT_INITIALIZED);
}
DatabaseAccount databaseAccount = this.globalEndpointManager.getDatabaseAccountFromCache(this.serviceEndpoint).block();
return BridgeInternal.getQueryEngineConfiuration(databaseAccount);
}
}
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