Class LBHttpSolrClient
- java.lang.Object
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- org.apache.solr.client.solrj.SolrClient
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- org.apache.solr.client.solrj.impl.LBSolrClient
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- org.apache.solr.client.solrj.impl.LBHttpSolrClient
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- All Implemented Interfaces:
Closeable
,Serializable
,AutoCloseable
@Deprecated(since="9.0") public class LBHttpSolrClient extends LBSolrClient
Deprecated.Please useLBHttp2SolrClient
LBHttpSolrClient or "LoadBalanced HttpSolrClient" is a load balancing wrapper aroundHttpSolrClient
. This is useful when you have multiple Solr servers and the requests need to be Load Balanced among them.Do NOT use this class for indexing in leader/follower scenarios since documents must be sent to the correct leader; no inter-node routing is done.
In SolrCloud (leader/replica) scenarios, it is usually better to use
CloudSolrClient
, but this class may be used for updates because the server will forward them to the appropriate leader.It offers automatic failover when a server goes down and it detects when the server comes back up.
Load balancing is done using a simple round-robin on the list of servers.
If a request to a server fails by an IOException due to a connection timeout or read timeout then the host is taken off the list of live servers and moved to a 'dead server list' and the request is resent to the next live server. This process is continued till it tries all the live servers. If at least one server is alive, the request succeeds, and if not it fails.
SolrClient lbHttpSolrClient = new LBHttpSolrClient("http://host1:8080/solr/", "http://host2:8080/solr", "http://host2:8080/solr"); //or if you wish to pass the HttpClient do as follows httpClient httpClient = new HttpClient(); SolrClient lbHttpSolrClient = new LBHttpSolrClient(httpClient, "http://host1:8080/solr/", "http://host2:8080/solr", "http://host2:8080/solr");
LBSolrClient.setAliveCheckInterval(int)
, the default is set to one minute.When to use this?
This can be used as a software load balancer when you do not wish to setup an external load balancer. Alternatives to this code are to use a dedicated hardware load balancer or using Apache httpd with mod_proxy_balancer as a load balancer. See Load balancing on Wikipedia- Since:
- solr 1.4
- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
LBHttpSolrClient.Builder
Deprecated.ConstructsLBHttpSolrClient
instances from provided configuration.-
Nested classes/interfaces inherited from class org.apache.solr.client.solrj.impl.LBSolrClient
LBSolrClient.Req, LBSolrClient.Rsp, LBSolrClient.ServerIterator, LBSolrClient.ServerWrapper
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Field Summary
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Fields inherited from class org.apache.solr.client.solrj.impl.LBSolrClient
parser, queryParams, requestWriter, RETRY_CODES, zombieServers
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Constructor Summary
Constructors Modifier Constructor Description protected
LBHttpSolrClient(LBHttpSolrClient.Builder builder)
Deprecated.The provided httpClient should use a multi-threaded connection manager
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
close()
Deprecated.protected SolrClient
getClient(String baseUrl)
Deprecated.org.apache.http.client.HttpClient
getHttpClient()
Deprecated.Return the HttpClient this instance uses.protected HttpSolrClient
makeSolrClient(String server)
Deprecated.String
removeSolrServer(String server)
Deprecated.-
Methods inherited from class org.apache.solr.client.solrj.impl.LBSolrClient
addQueryParams, addSolrServer, addZombie, createServerWrapper, doRequest, getParser, getQueryParams, getRequestWriter, normalize, pickServer, request, request, request, setAliveCheckInterval, setParser, setQueryParams, setRequestWriter, updateAliveList
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Methods inherited from class org.apache.solr.client.solrj.SolrClient
add, add, add, add, add, add, add, add, add, add, addBean, addBean, addBean, addBean, addBeans, addBeans, addBeans, addBeans, addBeans, addBeans, commit, commit, commit, commit, commit, commit, deleteById, deleteById, deleteById, deleteById, deleteById, deleteById, deleteById, deleteById, deleteByQuery, deleteByQuery, deleteByQuery, deleteByQuery, getBinder, getById, getById, getById, getById, getById, getById, getById, getById, getContext, optimize, optimize, optimize, optimize, optimize, optimize, ping, ping, query, query, query, query, queryAndStreamResponse, queryAndStreamResponse, queryAndStreamResponse, request, rollback, rollback
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Constructor Detail
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LBHttpSolrClient
protected LBHttpSolrClient(LBHttpSolrClient.Builder builder)
Deprecated.The provided httpClient should use a multi-threaded connection manager
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Method Detail
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makeSolrClient
protected HttpSolrClient makeSolrClient(String server)
Deprecated.
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getClient
protected SolrClient getClient(String baseUrl)
Deprecated.- Specified by:
getClient
in classLBSolrClient
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removeSolrServer
public String removeSolrServer(String server)
Deprecated.- Overrides:
removeSolrServer
in classLBSolrClient
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close
public void close()
Deprecated.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Overrides:
close
in classLBSolrClient
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getHttpClient
public org.apache.http.client.HttpClient getHttpClient()
Deprecated.Return the HttpClient this instance uses.
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