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spring-cloud-netflix
Commit 0e8ce13c by Dave Syer
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Copy javadocs from interfaces to config property fields

parent e4a1b50e
Showing with 417 additions and 15 deletions
spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientConfigBean.java
/*
* Copyright 2013-2014 the original author or authors.
*
* Licensed 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.
*/
* Copyright 2013-2014 the original author or authors.
*
* Licensed 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.springframework.cloud.netflix.eureka;
......@@ -58,90 +58,324 @@ public class EurekaClientConfigBean implements EurekaClientConfig, EurekaConstan
private EurekaTransportConfig transport = new CloudEurekaTransportConfig();
/**
* Indicates how often(in seconds) to fetch the registry information from the eureka
* server.
*/
private int registryFetchIntervalSeconds = 30;
/**
* Indicates how often(in seconds) to replicate instance changes to be replicated to
* the eureka server.
*/
private int instanceInfoReplicationIntervalSeconds = 30;
/**
* Indicates how long initially (in seconds) to replicate instance info to the eureka
* server
*/
private int initialInstanceInfoReplicationIntervalSeconds = 40;
/**
* Indicates how often(in seconds) to poll for changes to eureka server information.
* Eureka servers could be added or removed and this setting controls how soon the
* eureka clients should know about it.
*/
private int eurekaServiceUrlPollIntervalSeconds = 5 * MINUTES;
/**
* Gets the proxy port to eureka server if any.
*/
private String proxyPort;
/**
* Gets the proxy host to eureka server if any.
*/
private String proxyHost;
/**
* Gets the proxy user name if any.
*/
private String proxyUserName;
/**
* Gets the proxy password if any.
*/
private String proxyPassword;
/**
* Indicates how long to wait (in seconds) before a read from eureka server needs to
* timeout.
*/
private int eurekaServerReadTimeoutSeconds = 8;
/**
* Indicates how long to wait (in seconds) before a connection to eureka server needs
* to timeout. Note that the connections in the client are pooled by
* org.apache.http.client.HttpClient and this setting affects the actual connection
* creation and also the wait time to get the connection from the pool.
*/
private int eurekaServerConnectTimeoutSeconds = 5;
/**
* Gets the name of the implementation which implements BackupRegistry to fetch the
* registry information as a fall back option for only the first time when the eureka
* client starts.
*
* This may be needed for applications which needs additional resiliency for registry
* information without which it cannot operate.
*/
private String backupRegistryImpl;
/**
* Gets the total number of connections that is allowed from eureka client to all
* eureka servers.
*/
private int eurekaServerTotalConnections = 200;
/**
* Gets the total number of connections that is allowed from eureka client to a eureka
* server host.
*/
private int eurekaServerTotalConnectionsPerHost = 50;
/**
* Gets the URL context to be used to construct the service url to contact eureka
* server when the list of eureka servers come from the DNS. This information is not
* required if the contract returns the service urls from eurekaServerServiceUrls.
*
* The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the
* eureka client expects the DNS to configured a certain way so that it can fetch
* changing eureka servers dynamically. The changes are effective at runtime.
*/
private String eurekaServerURLContext;
/**
* Gets the port to be used to construct the service url to contact eureka server when
* the list of eureka servers come from the DNS.This information is not required if
* the contract returns the service urls eurekaServerServiceUrls(String).
*
* The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the
* eureka client expects the DNS to configured a certain way so that it can fetch
* changing eureka servers dynamically.
*
* The changes are effective at runtime.
*/
private String eurekaServerPort;
/**
* Gets the DNS name to be queried to get the list of eureka servers.This information
* is not required if the contract returns the service urls by implementing
* serviceUrls.
*
* The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the
* eureka client expects the DNS to configured a certain way so that it can fetch
* changing eureka servers dynamically.
*
* The changes are effective at runtime.
*/
private String eurekaServerDNSName;
/**
* Gets the region (used in AWS datacenters) where this instance resides.
*/
private String region = "us-east-1";
/**
* Indicates how much time (in seconds) that the HTTP connections to eureka server can
* stay idle before it can be closed.
*
* In the AWS environment, it is recommended that the values is 30 seconds or less,
* since the firewall cleans up the connection information after a few mins leaving
* the connection hanging in limbo
*/
private int eurekaConnectionIdleTimeoutSeconds = 30;
/**
* Indicates whether the client is only interested in the registry information for a
* single VIP.
*/
private String registryRefreshSingleVipAddress;
/**
* The thread pool size for the heartbeatExecutor to initialise with
*/
private int heartbeatExecutorThreadPoolSize = 2;
/**
* Heartbeat executor exponential back off related property. It is a maximum
* multiplier value for retry delay, in case where a sequence of timeouts occurred.
*/
private int heartbeatExecutorExponentialBackOffBound = 10;
/**
* The thread pool size for the cacheRefreshExecutor to initialise with
*/
private int cacheRefreshExecutorThreadPoolSize = 2;
/**
* Cache refresh executor exponential back off related property. It is a maximum
* multiplier value for retry delay, in case where a sequence of timeouts occurred.
*/
private int cacheRefreshExecutorExponentialBackOffBound = 10;
/**
* Map of availability zone to fully qualified URLs to communicate with eureka server.
*
* Typically the eureka server URLs carry protocol,host,port,context and version
* information if any. Example:
* http://ec2-256-156-243-129.compute-1.amazonaws.com:7001/eureka/
*
* The changes are effective at runtime at the next service url refresh cycle as
* specified by eurekaServiceUrlPollIntervalSeconds.
*/
private Map<String, String> serviceUrl = new HashMap<>();
{
this.serviceUrl.put(DEFAULT_ZONE, DEFAULT_URL);
}
/**
* Indicates whether the content fetched from eureka server has to be compressed
* whenever it is supported by the server. The registry information from the eureka
* server is compressed for optimum network traffic.
*/
private boolean gZipContent = true;
/**
* Indicates whether the eureka client should use the DNS mechanism to fetch a list of
* eureka servers to talk to. When the DNS name is updated to have additional servers,
* that information is used immediately after the eureka client polls for that
* information as specified in eurekaServiceUrlPollIntervalSeconds.
*
* Alternatively, the service urls can be returned serviceUrls, but the users should
* implement their own mechanism to return the updated list in case of changes.
*
* The changes are effective at runtime.
*/
private boolean useDnsForFetchingServiceUrls = false;
/**
* Indicates whether or not this instance should register its information with eureka
* server for discovery by others.
*
* In some cases, you do not want your instances to be discovered whereas you just
* want do discover other instances.
*/
private boolean registerWithEureka = true;
/**
* Indicates whether or not this instance should try to use the eureka server in the
* same zone for latency and/or other reason.
*
* Ideally eureka clients are configured to talk to servers in the same zone
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSeconds
*/
private boolean preferSameZoneEureka = true;
/**
* Indicates whether to log differences between the eureka server and the eureka
* client in terms of registry information.
*
* Eureka client tries to retrieve only delta changes from eureka server to minimize
* network traffic. After receiving the deltas, eureka client reconciles the
* information from the server to verify it has not missed out some information.
* Reconciliation failures could happen when the client has had network issues
* communicating to server.If the reconciliation fails, eureka client gets the full
* registry information.
*
* While getting the full registry information, the eureka client can log the
* differences between the client and the server and this setting controls that.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSecondsr
*/
private boolean logDeltaDiff;
/**
* Indicates whether the eureka client should disable fetching of delta and should
* rather resort to getting the full registry information.
*
* Note that the delta fetches can reduce the traffic tremendously, because the rate
* of change with the eureka server is normally much lower than the rate of fetches.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSeconds
*/
private boolean disableDelta;
/**
* Comma separated list of regions for which the eureka registry information will be
* fetched. It is mandatory to define the availability zones for each of these regions
* as returned by availabilityZones. Failing to do so, will result in failure of
* discovery client startup.
*
*/
private String fetchRemoteRegionsRegistry;
/**
* Gets the list of availability zones (used in AWS data centers) for the region in
* which this instance resides.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSeconds.
*/
private Map<String, String> availabilityZones = new HashMap<>();
/**
* Indicates whether to get the applications after filtering the applications for
* instances with only InstanceStatus UP states.
*/
private boolean filterOnlyUpInstances = true;
/**
* Indicates whether this client should fetch eureka registry information from eureka
* server.
*/
private boolean fetchRegistry = true;
/**
* Get a replacement string for Dollar sign <code>$</code> during
* serializing/deserializing information in eureka server.
*/
private String dollarReplacement = "_-";
/**
* Get a replacement string for underscore sign <code>_</code> during
* serializing/deserializing information in eureka server.
*/
private String escapeCharReplacement = "__";
/**
* Indicates whether server can redirect a client request to a backup server/cluster.
* If set to false, the server will handle the request directly, If set to true, it
* may send HTTP redirect to the client, with a new server location.
*/
private boolean allowRedirects = false;
/**
* If set to true, local status updates via ApplicationInfoManager will trigger
* on-demand (but rate limited) register/updates to remote eureka servers
*/
private boolean onDemandUpdateStatusChange = true;
/**
* This is a transient config and once the latest codecs are stable, can be removed
* (as there will only be one)
*/
private String encoderName;
/**
* This is a transient config and once the latest codecs are stable, can be removed
* (as there will only be one)
*/
private String decoderName;
/**
* EurekaAccept name for client data accept
*/
private String clientDataAccept = EurekaAccept.full.name();
@Override
......
spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/eureka/EurekaInstanceConfigBean.java
......@@ -49,68 +49,236 @@ public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig {
@Setter(AccessLevel.PRIVATE)
private InetUtils inetUtils;
/**
* Get the name of the application to be registered with eureka.
*/
@Value("${spring.application.name:unknown}")
private String appname = "unknown";
/**
* Get the name of the application group to be registered with eureka.
*/
private String appGroupName;
/**
* Indicates whether the instance should be enabled for taking traffic as soon as it
* is registered with eureka. Sometimes the application might need to do some
* pre-processing before it is ready to take traffic.
*/
private boolean instanceEnabledOnit;
/**
* Get the non-secure port on which the instance should receive traffic.
*/
private int nonSecurePort = 80;
/**
* Get the Secure port on which the instance should receive traffic.
*/
private int securePort = 443;
/**
* Indicates whether the non-secure port should be enabled for traffic or not.
*/
private boolean nonSecurePortEnabled = true;
/**
* Indicates whether the secure port should be enabled for traffic or not.
*/
private boolean securePortEnabled;
/**
* Indicates how often (in seconds) the eureka client needs to send heartbeats to
* eureka server to indicate that it is still alive. If the heartbeats are not
* received for the period specified in leaseExpirationDurationInSeconds, eureka
* server will remove the instance from its view, there by disallowing traffic to this
* instance.
*
* Note that the instance could still not take traffic if it implements
* HealthCheckCallback and then decides to make itself unavailable.
*/
private int leaseRenewalIntervalInSeconds = 30;
/**
* Indicates the time in seconds that the eureka server waits since it received the
* last heartbeat before it can remove this instance from its view and there by
* disallowing traffic to this instance.
*
* Setting this value too long could mean that the traffic could be routed to the
* instance even though the instance is not alive. Setting this value too small could
* mean, the instance may be taken out of traffic because of temporary network
* glitches.This value to be set to atleast higher than the value specified in
* leaseRenewalIntervalInSeconds.
*/
private int leaseExpirationDurationInSeconds = 90;
/**
* Gets the virtual host name defined for this instance.
*
* This is typically the way other instance would find this instance by using the
* virtual host name.Think of this as similar to the fully qualified domain name, that
* the users of your services will need to find this instance.
*/
@Value("${spring.application.name:unknown}")
private String virtualHostName;
/**
* Get the unique Id (within the scope of the appName) of this instance to be
* registered with eureka.
*/
private String instanceId;
/**
* Gets the secure virtual host name defined for this instance.
*
* This is typically the way other instance would find this instance by using the
* secure virtual host name.Think of this as similar to the fully qualified domain
* name, that the users of your services will need to find this instance.
*/
private String secureVirtualHostName;
/**
* Gets the AWS autoscaling group name associated with this instance. This information
* is specifically used in an AWS environment to automatically put an instance out of
* service after the instance is launched and it has been disabled for traffic..
*/
private String aSGName;
/**
* Gets the metadata name/value pairs associated with this instance. This information
* is sent to eureka server and can be used by other instances.
*/
private Map<String, String> metadataMap = new HashMap<>();
/**
* Returns the data center this instance is deployed. This information is used to get
* some AWS specific instance information if the instance is deployed in AWS.
*/
private DataCenterInfo dataCenterInfo = new MyDataCenterInfo(
DataCenterInfo.Name.MyOwn);
/**
* Get the IPAdress of the instance. This information is for academic purposes only as
* the communication from other instances primarily happen using the information
* supplied in {@link #getHostName(boolean)}.
*/
private String ipAddress;
/**
* Gets the relative status page URL path for this instance. The status page URL is
* then constructed out of the hostName and the type of communication - secure or
* unsecure as specified in securePort and nonSecurePort.
*
* It is normally used for informational purposes for other services to find about the
* status of this instance. Users can provide a simple HTML indicating what is the
* current status of the instance.
*/
private String statusPageUrlPath = "/info";
/**
* Gets the absolute status page URL path for this instance. The users can provide the
* statusPageUrlPath if the status page resides in the same instance talking to
* eureka, else in the cases where the instance is a proxy for some other server,
* users can provide the full URL. If the full URL is provided it takes precedence.
*
* It is normally used for informational purposes for other services to find about the
* status of this instance. Users can provide a simple HTML indicating what is the
* current status of the instance.
*/
private String statusPageUrl;
/**
* Gets the relative home page URL Path for this instance. The home page URL is then
* constructed out of the hostName and the type of communication - secure or unsecure.
*
* It is normally used for informational purposes for other services to use it as a
* landing page.
*/
private String homePageUrlPath = "/";
/**
* Gets the absolute home page URL for this instance. The users can provide the
* homePageUrlPath if the home page resides in the same instance talking to eureka,
* else in the cases where the instance is a proxy for some other server, users can
* provide the full URL. If the full URL is provided it takes precedence.
*
* It is normally used for informational purposes for other services to use it as a
* landing page. The full URL should follow the format http://${eureka.hostname}:7001/
* where the value ${eureka.hostname} is replaced at runtime.
*/
private String homePageUrl;
/**
* Gets the relative health check URL path for this instance. The health check page
* URL is then constructed out of the hostname and the type of communication - secure
* or unsecure as specified in securePort and nonSecurePort.
*
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage.
*/
private String healthCheckUrlPath = "/health";
/**
* Gets the absolute health check page URL for this instance. The users can provide
* the healthCheckUrlPath if the health check page resides in the same instance
* talking to eureka, else in the cases where the instance is a proxy for some other
* server, users can provide the full URL. If the full URL is provided it takes
* precedence.
*
* <p>
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage. The full
* URL should follow the format http://${eureka.hostname}:7001/ where the value
* ${eureka.hostname} is replaced at runtime.
*/
private String healthCheckUrl;
/**
* Gets the absolute secure health check page URL for this instance. The users can
* provide the secureHealthCheckUrl if the health check page resides in the same
* instance talking to eureka, else in the cases where the instance is a proxy for
* some other server, users can provide the full URL. If the full URL is provided it
* takes precedence.
*
* <p>
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage. The full
* URL should follow the format http://${eureka.hostname}:7001/ where the value
* ${eureka.hostname} is replaced at runtime.
*/
private String secureHealthCheckUrl;
/**
* Get the namespace used to find properties. Ignored in Spring Cloud.
*/
private String namespace = "eureka";
/**
* The hostname if it can be determined at configuration time (otherwise it will be
* guessed from OS primitives).
*/
private String hostname;
/**
* Flag to say that, when guessing a hostname, the IP address of the server should be
* used in prference to the hostname reported by the OS.
*/
private boolean preferIpAddress = false;
/**
* Initial status to register with rmeote Eureka server.
*/
private InstanceStatus initialStatus = InstanceStatus.UP;
public String getHostname() {
return getHostName(false);
}
private EurekaInstanceConfigBean() {}
private EurekaInstanceConfigBean() {
}
public EurekaInstanceConfigBean(InetUtils inetUtils) {
this.inetUtils = inetUtils;
......
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