001 package com.bigllc.retsiq.examples;
002
003 import java.io.FileInputStream;
004 import java.io.FileOutputStream;
005 import java.io.IOException;
006 import java.net.MalformedURLException;
007 import java.util.List;
008
009 import com.bigllc.retsiq.api.RETSConstants.MetadataFormat;
010 import com.bigllc.retsiq.api.RETSConstants.MetadataType;
011 import com.bigllc.retsiq.api.RETSConstants.Version;
012 import com.bigllc.retsiq.metadata.MetadataSystem;
013 import com.bigllc.retsiq.metadata.io.MetadataTransformer;
014 import com.bigllc.retsiq.metadata.io.MetadataTransformerFactory;
015 import com.bigllc.retsiq.metadata.io.XmlMetadataSource;
016 import com.bigllc.retsiq.simpleclient.RETSClientException;
017 import com.bigllc.retsiq.simpleclient.RETSConnection;
018 import com.bigllc.retsiq.simpleclient.RETSUserSession;
019
020 /**
021 * Example to demonstrate saving and loading metadata to and from
022 * a file.
023 *
024 * This example will require greater memory allocation to hold the
025 * metadata. This can be set by using the VM arguments -Xms128m and
026 * -Xmx256m.
027 *
028 * @author Marc G. Smith
029 */
030 public class MetadataSaveAndLoad
031 {
032 public static void main(String[] args) throws MalformedURLException
033 {
034 String loginurl = "http://rets.server.com/rets/login";
035 String username = "username";
036 String password = "password";
037 String metadataFile = "/tmp/metadata.xml";
038
039 // Create the connection class
040 RETSConnection connection = new RETSConnection(loginurl);
041 RETSUserSession session = null;
042 FileOutputStream out = null;
043 FileInputStream in = null;
044
045 try {
046 // Authenticate the user and get session
047 session = connection.getSession(username, password);
048
049
050 // Get the metadata from the server
051 MetadataSystem system = session.getMetadata();
052
053 // Create the output stream for the metadata
054 out = new FileOutputStream(metadataFile);
055
056 // Get a standard xml transformer
057 MetadataTransformer transformer =
058 MetadataTransformerFactory.newTransformer(
059 MetadataFormat.STANDARD_XML,
060 Version.toEnum(session.getRetsVersion()),
061 true);
062
063 System.out.println("[WRITING METADATA]");
064
065 // Write the complete metadata to file
066 transformer.transform(
067 system, MetadataType.SYSTEM,
068 new String[] {"*"}, out);
069
070 out.close();
071 out = null;
072
073 System.out.println("[READING METADATA]");
074
075 // To read the metadata from a file create
076 // an input file stream
077 in = new FileInputStream(metadataFile);
078
079 // Create a metadata source
080 XmlMetadataSource source = new XmlMetadataSource(in);
081
082 // Build the metadata. This returns a list of systems
083 // This list should contain 1 item.
084 List<MetadataSystem> systems = source.build();
085 system = systems.get(0);
086
087 System.out.println(
088 "SYSTEM: " + system.getName() +
089 " - " + system.getDescription());
090 }
091 catch(IOException e) {
092 System.err.println(e.getMessage());
093 }
094 catch(RETSClientException e) {
095 System.err.println(e.getMessage());
096 }
097 catch(Exception e) {
098 System.err.println(e.getMessage());
099 }
100 finally {
101 if(session != null) {
102 try {
103 session.logout();
104 }
105 catch(RETSClientException e) {
106 System.err.println(e.getMessage());
107 }
108 }
109
110 if(out != null) {
111 try {
112 out.close();
113 }
114 catch(IOException e) {
115 System.err.println(e.getMessage());
116 }
117 }
118
119 if(in != null) {
120 try {
121 in.close();
122 }
123 catch(IOException e) {
124 System.err.println(e.getMessage());
125 }
126 }
127
128 }
129 }
130 }
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