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20 package org.apache.hadoop.hbase.rest;
21
22 import java.io.IOException;
23 import java.util.Map;
24
25 import javax.ws.rs.Consumes;
26 import javax.ws.rs.DELETE;
27 import javax.ws.rs.GET;
28 import javax.ws.rs.POST;
29 import javax.ws.rs.PUT;
30 import javax.ws.rs.Produces;
31 import javax.ws.rs.core.CacheControl;
32 import javax.ws.rs.core.Context;
33 import javax.ws.rs.core.Response;
34 import javax.ws.rs.core.Response.ResponseBuilder;
35 import javax.ws.rs.core.UriInfo;
36 import javax.xml.namespace.QName;
37
38 import org.apache.commons.logging.Log;
39 import org.apache.commons.logging.LogFactory;
40 import org.apache.hadoop.classification.InterfaceAudience;
41 import org.apache.hadoop.hbase.HColumnDescriptor;
42 import org.apache.hadoop.hbase.HTableDescriptor;
43 import org.apache.hadoop.hbase.TableExistsException;
44 import org.apache.hadoop.hbase.TableName;
45 import org.apache.hadoop.hbase.TableNotFoundException;
46 import org.apache.hadoop.hbase.client.HBaseAdmin;
47 import org.apache.hadoop.hbase.client.HTableInterface;
48 import org.apache.hadoop.hbase.rest.model.ColumnSchemaModel;
49 import org.apache.hadoop.hbase.rest.model.TableSchemaModel;
50 import org.apache.hadoop.hbase.util.Bytes;
51
52 @InterfaceAudience.Private
53 public class SchemaResource extends ResourceBase {
54 private static final Log LOG = LogFactory.getLog(SchemaResource.class);
55
56 static CacheControl cacheControl;
57 static {
58 cacheControl = new CacheControl();
59 cacheControl.setNoCache(true);
60 cacheControl.setNoTransform(false);
61 }
62
63 TableResource tableResource;
64
65
66
67
68
69
70 public SchemaResource(TableResource tableResource) throws IOException {
71 super();
72 this.tableResource = tableResource;
73 }
74
75 private HTableDescriptor getTableSchema() throws IOException,
76 TableNotFoundException {
77 HTableInterface table = servlet.getTable(tableResource.getName());
78 try {
79 return table.getTableDescriptor();
80 } finally {
81 table.close();
82 }
83 }
84
85 @GET
86 @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
87 MIMETYPE_PROTOBUF_IETF})
88 public Response get(final @Context UriInfo uriInfo) {
89 if (LOG.isDebugEnabled()) {
90 LOG.debug("GET " + uriInfo.getAbsolutePath());
91 }
92 servlet.getMetrics().incrementRequests(1);
93 try {
94 ResponseBuilder response =
95 Response.ok(new TableSchemaModel(getTableSchema()));
96 response.cacheControl(cacheControl);
97 servlet.getMetrics().incrementSucessfulGetRequests(1);
98 return response.build();
99 } catch (Exception e) {
100 servlet.getMetrics().incrementFailedGetRequests(1);
101 return processException(e);
102 }
103 }
104
105 private Response replace(final byte[] name, final TableSchemaModel model,
106 final UriInfo uriInfo, final HBaseAdmin admin) {
107 if (servlet.isReadOnly()) {
108 return Response.status(Response.Status.FORBIDDEN)
109 .type(MIMETYPE_TEXT).entity("Forbidden" + CRLF)
110 .build();
111 }
112 try {
113 HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(name));
114 for (Map.Entry<QName,Object> e: model.getAny().entrySet()) {
115 htd.setValue(e.getKey().getLocalPart(), e.getValue().toString());
116 }
117 for (ColumnSchemaModel family: model.getColumns()) {
118 HColumnDescriptor hcd = new HColumnDescriptor(family.getName());
119 for (Map.Entry<QName,Object> e: family.getAny().entrySet()) {
120 hcd.setValue(e.getKey().getLocalPart(), e.getValue().toString());
121 }
122 htd.addFamily(hcd);
123 }
124 if (admin.tableExists(name)) {
125 admin.disableTable(name);
126 admin.modifyTable(name, htd);
127 admin.enableTable(name);
128 servlet.getMetrics().incrementSucessfulPutRequests(1);
129 } else try {
130 admin.createTable(htd);
131 servlet.getMetrics().incrementSucessfulPutRequests(1);
132 } catch (TableExistsException e) {
133
134 return Response.status(Response.Status.NOT_MODIFIED)
135 .type(MIMETYPE_TEXT).entity("Not modified" + CRLF)
136 .build();
137 }
138 return Response.created(uriInfo.getAbsolutePath()).build();
139 } catch (Exception e) {
140 servlet.getMetrics().incrementFailedPutRequests(1);
141 return processException(e);
142 }
143 }
144
145 private Response update(final byte[] name, final TableSchemaModel model,
146 final UriInfo uriInfo, final HBaseAdmin admin) {
147 if (servlet.isReadOnly()) {
148 return Response.status(Response.Status.FORBIDDEN)
149 .type(MIMETYPE_TEXT).entity("Forbidden" + CRLF)
150 .build();
151 }
152 try {
153 HTableDescriptor htd = admin.getTableDescriptor(name);
154 admin.disableTable(name);
155 try {
156 for (ColumnSchemaModel family: model.getColumns()) {
157 HColumnDescriptor hcd = new HColumnDescriptor(family.getName());
158 for (Map.Entry<QName,Object> e: family.getAny().entrySet()) {
159 hcd.setValue(e.getKey().getLocalPart(), e.getValue().toString());
160 }
161 if (htd.hasFamily(hcd.getName())) {
162 admin.modifyColumn(name, hcd);
163 } else {
164 admin.addColumn(name, hcd);
165 }
166 }
167 } catch (IOException e) {
168 return Response.status(Response.Status.SERVICE_UNAVAILABLE)
169 .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
170 .build();
171 } finally {
172 admin.enableTable(tableResource.getName());
173 }
174 servlet.getMetrics().incrementSucessfulPutRequests(1);
175 return Response.ok().build();
176 } catch (Exception e) {
177 servlet.getMetrics().incrementFailedPutRequests(1);
178 return processException(e);
179 }
180 }
181
182 private Response update(final TableSchemaModel model, final boolean replace,
183 final UriInfo uriInfo) {
184 try {
185 byte[] name = Bytes.toBytes(tableResource.getName());
186 HBaseAdmin admin = servlet.getAdmin();
187 if (replace || !admin.tableExists(name)) {
188 return replace(name, model, uriInfo, admin);
189 } else {
190 return update(name, model, uriInfo, admin);
191 }
192 } catch (Exception e) {
193 servlet.getMetrics().incrementFailedPutRequests(1);
194 return processException(e);
195 }
196 }
197
198 @PUT
199 @Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
200 MIMETYPE_PROTOBUF_IETF})
201 public Response put(final TableSchemaModel model,
202 final @Context UriInfo uriInfo) {
203 if (LOG.isDebugEnabled()) {
204 LOG.debug("PUT " + uriInfo.getAbsolutePath());
205 }
206 servlet.getMetrics().incrementRequests(1);
207 return update(model, true, uriInfo);
208 }
209
210 @POST
211 @Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
212 MIMETYPE_PROTOBUF_IETF})
213 public Response post(final TableSchemaModel model,
214 final @Context UriInfo uriInfo) {
215 if (LOG.isDebugEnabled()) {
216 LOG.debug("PUT " + uriInfo.getAbsolutePath());
217 }
218 servlet.getMetrics().incrementRequests(1);
219 return update(model, false, uriInfo);
220 }
221
222 @DELETE
223 public Response delete(final @Context UriInfo uriInfo) {
224 if (LOG.isDebugEnabled()) {
225 LOG.debug("DELETE " + uriInfo.getAbsolutePath());
226 }
227 servlet.getMetrics().incrementRequests(1);
228 if (servlet.isReadOnly()) {
229 return Response.status(Response.Status.FORBIDDEN).type(MIMETYPE_TEXT)
230 .entity("Forbidden" + CRLF).build();
231 }
232 try {
233 HBaseAdmin admin = servlet.getAdmin();
234 boolean success = false;
235 for (int i = 0; i < 10; i++) try {
236 admin.disableTable(tableResource.getName());
237 success = true;
238 break;
239 } catch (IOException e) {
240 }
241 if (!success) {
242 throw new IOException("could not disable table");
243 }
244 admin.deleteTable(tableResource.getName());
245 servlet.getMetrics().incrementSucessfulDeleteRequests(1);
246 return Response.ok().build();
247 } catch (Exception e) {
248 servlet.getMetrics().incrementFailedDeleteRequests(1);
249 return processException(e);
250 }
251 }
252 }